CVE-2026-102824 (GCVE-0-2026-102824)
Vulnerability from cvelistv5
Published
2026-09-29 18:27
Modified
2026-09-30 20:24
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Summary
Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlkem.rs accepts an all-zero 32-byte peer X25519 public key in both server_dh and compute_shared_secret, forcing the X25519 contribution to the combined shared secret to zero. A malicious SSH peer can therefore make the combined secret depend only on ML-KEM, defeating the hybrid exchange's intended fallback protection if ML-KEM is later weakened. This issue is fixed in version 0.63.0.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-102824",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-30T20:24:54.936526Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T20:24:58.381Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "russh",
"vendor": "Eugeny",
"versions": [
{
"status": "affected",
"version": "\u003c 0.63.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlkem.rs accepts an all-zero 32-byte peer X25519 public key in both server_dh and compute_shared_secret, forcing the X25519 contribution to the combined shared secret to zero. A malicious SSH peer can therefore make the combined secret depend only on ML-KEM, defeating the hybrid exchange\u0027s intended fallback protection if ML-KEM is later weakened. This issue is fixed in version 0.63.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-327",
"description": "CWE-327: Use of a Broken or Risky Cryptographic Algorithm",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-29T18:27:41.650Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/Eugeny/russh/security/advisories/GHSA-w3jg-pjxf-73p4",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/Eugeny/russh/security/advisories/GHSA-w3jg-pjxf-73p4"
},
{
"name": "https://github.com/Eugeny/russh/commit/8da8967f196472576b1565d518a0ed60fce60f0c",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Eugeny/russh/commit/8da8967f196472576b1565d518a0ed60fce60f0c"
},
{
"name": "https://github.com/Eugeny/russh/releases/tag/v0.63.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/Eugeny/russh/releases/tag/v0.63.0"
}
],
"source": {
"advisory": "GHSA-w3jg-pjxf-73p4",
"discovery": "UNKNOWN"
},
"title": "Russh: Missing X25519 zero-point validation in hybrid ML-KEM key exchange"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-102824",
"datePublished": "2026-09-29T18:27:41.650Z",
"dateReserved": "2026-09-29T17:25:25.265Z",
"dateUpdated": "2026-09-30T20:24:58.381Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-102824\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-30T20:24:54.936526Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-30T20:09:35.101Z\"}}], \"cna\": {\"title\": \"Russh: Missing X25519 zero-point validation in hybrid ML-KEM key exchange\", \"source\": {\"advisory\": \"GHSA-w3jg-pjxf-73p4\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"Eugeny\", \"product\": \"russh\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 0.63.0\"}]}], \"references\": [{\"url\": \"https://github.com/Eugeny/russh/security/advisories/GHSA-w3jg-pjxf-73p4\", \"name\": \"https://github.com/Eugeny/russh/security/advisories/GHSA-w3jg-pjxf-73p4\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/Eugeny/russh/commit/8da8967f196472576b1565d518a0ed60fce60f0c\", \"name\": \"https://github.com/Eugeny/russh/commit/8da8967f196472576b1565d518a0ed60fce60f0c\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/Eugeny/russh/releases/tag/v0.63.0\", \"name\": \"https://github.com/Eugeny/russh/releases/tag/v0.63.0\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlkem.rs accepts an all-zero 32-byte peer X25519 public key in both server_dh and compute_shared_secret, forcing the X25519 contribution to the combined shared secret to zero. A malicious SSH peer can therefore make the combined secret depend only on ML-KEM, defeating the hybrid exchange\u0027s intended fallback protection if ML-KEM is later weakened. This issue is fixed in version 0.63.0.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-327\", \"description\": \"CWE-327: Use of a Broken or Risky Cryptographic Algorithm\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-09-29T18:27:41.650Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-102824\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-30T20:24:58.381Z\", \"dateReserved\": \"2026-09-29T17:25:25.265Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-09-29T18:27:41.650Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…