Medium 6.7Published Oct 13, 2026

CVE-2026-54697ConnectBot SSH: Excessive allocation and integer overflow in DER private-key parsing

Updated under an hour ago (2026-10-19 11:10 UTC)

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It affects connectbot cbssh. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for connectbot cbssh

Exploited in the last 30 days

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.

CVSS: 6.7 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-190, CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 13, 2026

Affected products

Affected products

connectbot cbssh connectbot:cbssh (from the name)	before 0.3.1	CNA record

References

https://github.com/connectbot/cbssh/security/advisories/GHSA-vc8p-8pxg-rfwgx-refsource-confirm
https://github.com/connectbot/cbssh/commit/2bb917517bec0df229a02ca768d6eae84be72df0x-refsource-misc
https://github.com/connectbot/cbssh/releases/tag/v0.3.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.