CVE-2026-54697 (GCVE-0-2026-54697)
Vulnerability from cvelistv5
Published
2026-10-13 15:54
Modified
2026-10-13 16:07
Severity ?
VLAI Severity ?
EPSS score ?
Summary
ConnectBot SSH Client Library is written in Kotlin with Kaitai Struct and KStateMachine. Prior to 0.3.1, DerReader.readLength() accepts excessive long-form DER length octets, accumulates them into an Int, and primitive readers allocate arrays without checking the declared size against the remaining input. An application or user that loads an attacker-provided private-key file through SshClient.authenticatePublicKey(), SshKeys.decodePemPrivateKey(), SshSigning.sign(), or SshSigning.getPublicKey() can trigger integer wraparound, excessive allocation, or an uncaught OutOfMemoryError. SSH server host keys and agent-forwarding messages do not use this application-supplied private-key input path. No usable weakened key and no confidentiality or integrity impact have been demonstrated. This issue is fixed in version 0.3.1.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| connectbot | cbssh |
Version: < 0.3.1 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-54697",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-13T16:07:40.579697Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-13T16:07:53.782Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "cbssh",
"vendor": "connectbot",
"versions": [
{
"status": "affected",
"version": "\u003c 0.3.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "ConnectBot SSH Client Library is written in Kotlin with Kaitai Struct and KStateMachine. Prior to 0.3.1, DerReader.readLength() accepts excessive long-form DER length octets, accumulates them into an Int, and primitive readers allocate arrays without checking the declared size against the remaining input. An application or user that loads an attacker-provided private-key file through SshClient.authenticatePublicKey(), SshKeys.decodePemPrivateKey(), SshSigning.sign(), or SshSigning.getPublicKey() can trigger integer wraparound, excessive allocation, or an uncaught OutOfMemoryError. SSH server host keys and agent-forwarding messages do not use this application-supplied private-key input path. No usable weakened key and no confidentiality or integrity impact have been demonstrated. This issue is fixed in version 0.3.1."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 6.7,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-190",
"description": "CWE-190: Integer Overflow or Wraparound",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-13T15:54:48.714Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/connectbot/cbssh/security/advisories/GHSA-vc8p-8pxg-rfwg",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/connectbot/cbssh/security/advisories/GHSA-vc8p-8pxg-rfwg"
},
{
"name": "https://github.com/connectbot/cbssh/commit/2bb917517bec0df229a02ca768d6eae84be72df0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/connectbot/cbssh/commit/2bb917517bec0df229a02ca768d6eae84be72df0"
},
{
"name": "https://github.com/connectbot/cbssh/releases/tag/v0.3.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/connectbot/cbssh/releases/tag/v0.3.1"
}
],
"source": {
"advisory": "GHSA-vc8p-8pxg-rfwg",
"discovery": "UNKNOWN"
},
"title": "ConnectBot SSH: Excessive allocation and integer overflow in DER private-key parsing"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54697",
"datePublished": "2026-10-13T15:54:48.714Z",
"dateReserved": "2026-06-15T22:58:06.562Z",
"dateUpdated": "2026-10-13T16:07:53.782Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"cna\": {\"title\": \"ConnectBot SSH: Excessive allocation and integer overflow in DER private-key parsing\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-190\", \"lang\": \"en\", \"description\": \"CWE-190: Integer Overflow or Wraparound\", \"type\": \"CWE\"}]}, {\"descriptions\": [{\"cweId\": \"CWE-789\", \"lang\": \"en\", \"description\": \"CWE-789: Memory Allocation with Excessive Size Value\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV4_0\": {\"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"ACTIVE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"baseScore\": 6.7, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"version\": \"4.0\"}}], \"references\": [{\"name\": \"https://github.com/connectbot/cbssh/security/advisories/GHSA-vc8p-8pxg-rfwg\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/connectbot/cbssh/security/advisories/GHSA-vc8p-8pxg-rfwg\"}, {\"name\": \"https://github.com/connectbot/cbssh/commit/2bb917517bec0df229a02ca768d6eae84be72df0\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/connectbot/cbssh/commit/2bb917517bec0df229a02ca768d6eae84be72df0\"}, {\"name\": \"https://github.com/connectbot/cbssh/releases/tag/v0.3.1\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/connectbot/cbssh/releases/tag/v0.3.1\"}], \"affected\": [{\"vendor\": \"connectbot\", \"product\": \"cbssh\", \"versions\": [{\"version\": \"\u003c 0.3.1\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-10-13T15:54:48.714Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"ConnectBot SSH Client Library is written in Kotlin with Kaitai Struct and KStateMachine. Prior to 0.3.1, DerReader.readLength() accepts excessive long-form DER length octets, accumulates them into an Int, and primitive readers allocate arrays without checking the declared size against the remaining input. An application or user that loads an attacker-provided private-key file through SshClient.authenticatePublicKey(), SshKeys.decodePemPrivateKey(), SshSigning.sign(), or SshSigning.getPublicKey() can trigger integer wraparound, excessive allocation, or an uncaught OutOfMemoryError. SSH server host keys and agent-forwarding messages do not use this application-supplied private-key input path. No usable weakened key and no confidentiality or integrity impact have been demonstrated. This issue is fixed in version 0.3.1.\"}], \"source\": {\"advisory\": \"GHSA-vc8p-8pxg-rfwg\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-54697\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-10-13T16:07:40.579697Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-10-13T16:07:45.214Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-54697\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-06-15T22:58:06.562Z\", \"datePublished\": \"2026-10-13T15:54:48.714Z\", \"dateUpdated\": \"2026-10-13T16:07:53.782Z\"}",
"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…