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19 vulnerabilities found for by golang.org/x/crypto
CVE-2026-46598 (GCVE-0-2026-46598)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:14
Severity ?
VLAI Severity ?
EPSS score ?
Summary
For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent |
Version: 0 ≤ |
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
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],
"cna": {
"affected": [
{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/crypto/ssh/agent",
"product": "golang.org/x/crypto/ssh/agent",
"programRoutines": [
{
"name": "parseEd25519Cert"
},
{
"name": "parseEd25519Key"
},
{
"name": "ForwardToAgent"
},
{
"name": "ServeAgent"
}
],
"vendor": "golang.org/x/crypto",
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},
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"url": "https://go.dev/cl/781360"
},
{
"url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-5033"
}
],
"title": "Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent"
}
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CVE-2026-46595 (GCVE-0-2026-46595)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:21
Severity ?
VLAI Severity ?
EPSS score ?
Summary
Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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"programRoutines": [
{
"name": "connection.serverAuthenticate"
},
{
"name": "NewServerConn"
}
],
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{
"description": "CWE-863: Incorrect Authorization",
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},
{
"url": "https://go.dev/cl/781642"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-5023"
}
],
"title": "Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh"
}
},
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CVE-2026-42508 (GCVE-0-2026-42508)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:44
Severity ?
VLAI Severity ?
EPSS score ?
Summary
Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/knownhosts |
Version: 0 ≤ |
{
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{
"collectionURL": "https://pkg.go.dev",
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"packageName": "golang.org/x/crypto/ssh/knownhosts",
"product": "golang.org/x/crypto/ssh/knownhosts",
"programRoutines": [
{
"name": "hostKeyDB.IsRevoked"
}
],
"vendor": "golang.org/x/crypto",
"versions": [
{
"lessThan": "0.52.0",
"status": "affected",
"version": "0",
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],
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"lang": "en",
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}
],
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{
"descriptions": [
{
"description": "CWE-295: Improper Certificate Validation",
"lang": "en"
}
]
}
],
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"url": "https://go.dev/issue/79568"
},
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"url": "https://go.dev/cl/781220"
},
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},
{
"url": "https://pkg.go.dev/vuln/GO-2026-5021"
}
],
"title": "Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts"
}
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CVE-2026-39834 (GCVE-0-2026-39834)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:50
Severity ?
VLAI Severity ?
EPSS score ?
Summary
When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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"timestamp": "2026-05-22T18:50:30.848292Z",
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},
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{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/crypto/ssh",
"product": "golang.org/x/crypto/ssh",
"programRoutines": [
{
"name": "channel.WriteExtended"
},
{
"name": "Dial"
},
{
"name": "NewClientConn"
},
{
"name": "NewServerConn"
},
{
"name": "Session.CombinedOutput"
},
{
"name": "Session.Output"
},
{
"name": "Session.Run"
},
{
"name": "Session.Shell"
},
{
"name": "Session.Start"
},
{
"name": "channel.Write"
},
{
"name": "curve25519sha256.Client"
},
{
"name": "curve25519sha256.Server"
},
{
"name": "dhGEXSHA.Client"
},
{
"name": "dhGEXSHA.Server"
},
{
"name": "dhGroup.Client"
},
{
"name": "dhGroup.Server"
},
{
"name": "ecdh.Client"
},
{
"name": "ecdh.Server"
},
{
"name": "extChannel.Write"
},
{
"name": "mlkem768WithCurve25519sha256.Client"
},
{
"name": "mlkem768WithCurve25519sha256.Server"
}
],
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}
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{
"lang": "en",
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}
],
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{
"descriptions": [
{
"description": "CWE-190: Integer Overflow or Wraparound",
"lang": "en"
}
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}
],
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"url": "https://go.dev/cl/781663"
},
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"url": "https://pkg.go.dev/vuln/GO-2026-5020"
}
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"title": "Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh"
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CVE-2026-39831 (GCVE-0-2026-39831)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:52
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
{
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{
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"packageName": "golang.org/x/crypto/ssh",
"product": "golang.org/x/crypto/ssh",
"programRoutines": [
{
"name": "CertChecker.CheckCert"
},
{
"name": "skECDSAPublicKey.Verify"
},
{
"name": "skEd25519PublicKey.Verify"
},
{
"name": "connection.serverAuthenticate"
},
{
"name": "CertChecker.Authenticate"
},
{
"name": "CertChecker.CheckHostKey"
},
{
"name": "Certificate.Verify"
},
{
"name": "Dial"
},
{
"name": "NewClientConn"
},
{
"name": "NewServerConn"
}
],
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"version": "0",
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"value": "NCC Group Cryptography Services, sponsored by Teleport"
}
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"lang": "en",
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}
],
"problemTypes": [
{
"descriptions": [
{
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en"
}
]
}
],
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"orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
"shortName": "Go"
},
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{
"url": "https://go.dev/issue/79566"
},
{
"url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
},
{
"url": "https://go.dev/cl/781662"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-5019"
}
],
"title": "Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh"
}
},
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"state": "PUBLISHED"
},
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CVE-2026-39829 (GCVE-0-2026-39829)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:53
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
{
"containers": {
"adp": [
{
"metrics": [
{
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{
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{
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{
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{
"name": "NewSignerFromKey"
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{
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{
"name": "ParseKnownHosts"
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{
"name": "ParsePrivateKey"
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{
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}
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CVE-2026-39830 (GCVE-0-2026-39830)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:54
Severity ?
VLAI Severity ?
EPSS score ?
Summary
A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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{
"name": "mux.SendRequest"
},
{
"name": "mux.handleGlobalPacket"
},
{
"name": "channel.handlePacket"
},
{
"name": "channel.SendRequest"
},
{
"name": "Client.Listen"
},
{
"name": "Client.ListenTCP"
},
{
"name": "Client.ListenUnix"
},
{
"name": "Dial"
},
{
"name": "NewClientConn"
},
{
"name": "NewServerConn"
},
{
"name": "Session.CombinedOutput"
},
{
"name": "Session.Output"
},
{
"name": "Session.RequestPty"
},
{
"name": "Session.RequestSubsystem"
},
{
"name": "Session.Run"
},
{
"name": "Session.SendRequest"
},
{
"name": "Session.Setenv"
},
{
"name": "Session.Shell"
},
{
"name": "Session.Signal"
},
{
"name": "Session.Start"
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{
"name": "Session.WindowChange"
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"name": "unixListener.Close"
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}
],
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CVE-2026-39827 (GCVE-0-2026-39827)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:35
Severity ?
VLAI Severity ?
EPSS score ?
Summary
An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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CVE-2026-39835 (GCVE-0-2026-39835)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 17:45
Severity ?
VLAI Severity ?
EPSS score ?
Summary
SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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},
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{
"name": "CertChecker.CheckHostKey"
},
{
"name": "CertChecker.Authenticate"
}
],
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"lessThan": "0.52.0",
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}
],
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"description": "CWE-476: NULL Pointer Dereference",
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"url": "https://go.dev/cl/781660"
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CVE-2026-39828 (GCVE-0-2026-39828)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 17:44
Severity ?
VLAI Severity ?
EPSS score ?
Summary
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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"name": "connection.serverAuthenticate"
},
{
"name": "NewServerConn"
}
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}
],
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{
"description": "CWE-863: Incorrect Authorization",
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"url": "https://go.dev/cl/781621"
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"url": "https://pkg.go.dev/vuln/GO-2026-5014"
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CVE-2026-46597 (GCVE-0-2026-46597)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 14:08
Severity ?
VLAI Severity ?
EPSS score ?
Summary
An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
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},
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],
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"timestamp": "2026-05-22T14:08:24.589026Z",
"version": "2.0.3"
},
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}
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"name": "Dial"
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{
"name": "NewClientConn"
},
{
"name": "NewServerConn"
},
{
"name": "curve25519sha256.Client"
},
{
"name": "curve25519sha256.Server"
},
{
"name": "dhGEXSHA.Client"
},
{
"name": "dhGEXSHA.Server"
},
{
"name": "dhGroup.Client"
},
{
"name": "dhGroup.Server"
},
{
"name": "ecdh.Client"
},
{
"name": "ecdh.Server"
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{
"name": "mlkem768WithCurve25519sha256.Client"
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{
"name": "mlkem768WithCurve25519sha256.Server"
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"lang": "en",
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{
"description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
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},
{
"url": "https://go.dev/cl/781620"
},
{
"url": "https://pkg.go.dev/vuln/GO-2026-5013"
}
],
"title": "Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh"
}
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CVE-2026-39832 (GCVE-0-2026-39832)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 19:03
Severity ?
VLAI Severity ?
EPSS score ?
Summary
When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent |
Version: 0 ≤ |
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},
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"url": "https://pkg.go.dev/vuln/GO-2026-5006"
}
],
"title": "Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent"
}
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CVE-2026-39833 (GCVE-0-2026-39833)
Vulnerability from cvelistv5
Published
2026-05-22 02:31
Modified
2026-05-22 18:58
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent |
Version: 0 ≤ |
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}
],
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"description": "CWE-358: Improperly Implemented Security Check for Standard",
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CVE-2025-47914 (GCVE-0-2025-47914)
Vulnerability from cvelistv5
Published
2025-11-19 20:33
Modified
2025-11-20 17:15
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent |
Version: 0 ≤ |
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"name": "parseConstraints"
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{
"name": "ForwardToAgent"
},
{
"name": "ServeAgent"
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CVE-2025-58181 (GCVE-0-2025-58181)
Vulnerability from cvelistv5
Published
2025-11-19 20:33
Modified
2025-11-20 17:14
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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CVE-2025-47913 (GCVE-0-2025-47913)
Vulnerability from cvelistv5
Published
2025-11-13 21:29
Modified
2025-12-16 16:43
Severity ?
VLAI Severity ?
EPSS score ?
Summary
SSH clients receiving SSH_AGENT_SUCCESS when expecting a typed response will panic and cause early termination of the client process.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh/agent |
Version: 0 ≤ |
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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},
"title": "CISA ADP Vulnrichment"
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"product": "golang.org/x/crypto/ssh/agent",
"programRoutines": [
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"name": "client.SignWithFlags"
},
{
"name": "client.List"
},
{
"name": "agentKeyringSigner.Sign"
},
{
"name": "agentKeyringSigner.SignWithAlgorithm"
},
{
"name": "client.Sign"
},
{
"name": "client.Signers"
}
],
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"status": "affected",
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"value": "Jakub Ciolek"
},
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"lang": "en",
"value": "Nicola Murino"
}
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CVE-2025-22869 (GCVE-0-2025-22869)
Vulnerability from cvelistv5
Published
2025-02-26 03:07
Modified
2025-04-11 22:03
Severity ?
VLAI Severity ?
EPSS score ?
Summary
SSH servers which implement file transfer protocols are vulnerable to a denial of service attack from clients which complete the key exchange slowly, or not at all, causing pending content to be read into memory, but never transmitted.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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CVE-2024-45337 (GCVE-0-2024-45337)
Vulnerability from cvelistv5
Published
2024-12-11 18:55
Modified
2025-02-18 20:48
Severity ?
VLAI Severity ?
EPSS score ?
Summary
Applications and libraries which misuse connection.serverAuthenticate (via callback field ServerConfig.PublicKeyCallback) may be susceptible to an authorization bypass. The documentation for ServerConfig.PublicKeyCallback says that "A call to this function does not guarantee that the key offered is in fact used to authenticate." Specifically, the SSH protocol allows clients to inquire about whether a public key is acceptable before proving control of the corresponding private key. PublicKeyCallback may be called with multiple keys, and the order in which the keys were provided cannot be used to infer which key the client successfully authenticated with, if any. Some applications, which store the key(s) passed to PublicKeyCallback (or derived information) and make security relevant determinations based on it once the connection is established, may make incorrect assumptions. For example, an attacker may send public keys A and B, and then authenticate with A. PublicKeyCallback would be called only twice, first with A and then with B. A vulnerable application may then make authorization decisions based on key B for which the attacker does not actually control the private key. Since this API is widely misused, as a partial mitigation golang.org/x/cry...@v0.31.0 enforces the property that, when successfully authenticating via public key, the last key passed to ServerConfig.PublicKeyCallback will be the key used to authenticate the connection. PublicKeyCallback will now be called multiple times with the same key, if necessary. Note that the client may still not control the last key passed to PublicKeyCallback if the connection is then authenticated with a different method, such as PasswordCallback, KeyboardInteractiveCallback, or NoClientAuth. Users should be using the Extensions field of the Permissions return value from the various authentication callbacks to record data associated with the authentication attempt instead of referencing external state. Once the connection is established the state corresponding to the successful authentication attempt can be retrieved via the ServerConn.Permissions field. Note that some third-party libraries misuse the Permissions type by sharing it across authentication attempts; users of third-party libraries should refer to the relevant projects for guidance.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/ssh |
Version: 0 ≤ |
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CVE-2022-30636 (GCVE-0-2022-30636)
Vulnerability from cvelistv5
Published
2024-07-02 19:51
Modified
2024-08-07 16:21
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE 22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Summary
httpTokenCacheKey uses path.Base to extract the expected HTTP-01 token value to lookup in the DirCache implementation. On Windows, path.Base acts differently to filepath.Base, since Windows uses a different path separator (\ vs. /), allowing a user to provide a relative path, i.e. .well-known/acme-challenge/..\..\asd becomes ..\..\asd. The extracted path is then suffixed with +http-01, joined with the cache directory, and opened. Since the controlled path is suffixed with +http-01 before opening, the impact of this is significantly limited, since it only allows reading arbitrary files on the system if and only if they have this suffix.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| golang.org/x/crypto | golang.org/x/crypto/acme/autocert |
Version: 0 ≤ |
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