CVE-2026-86231
lowA security flaw has been discovered in mwiede jsch up to 2.28.5.
A security flaw has been discovered in mwiede jsch up to 2.28.5. Affected is the function getRevokedKeys of the file src/main/java/com/jcraft/jsch/KnownHosts.java. Performing a manipulation of the argument known_hosts results in improper check for certificate revocation. The attack is possible to be carried out remotely. The attack is considered to have high complexity. The exploitability is told to be difficult. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.28.6 is able to address this issue. The patch is named 194a2f76a5c0f1c3f778565be3fd66bcafc42d23. You should upgrade the affected component.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/mwiede/jsch/ cna@vuldb.com
- https://github.com/mwiede/jsch/commit/194a2f76a5c0f1c3f778565be3fd66bcafc42d23 cna@vuldb.com
- https://github.com/mwiede/jsch/issues/1091 cna@vuldb.com
- https://github.com/mwiede/jsch/pull/1098 cna@vuldb.com
- https://github.com/mwiede/jsch/releases/tag/jsch-2.28.6 cna@vuldb.com
- https://vuldb.com/cve/CVE-2026-86231 cna@vuldb.com
- https://vuldb.com/submit/898485 cna@vuldb.com
- https://vuldb.com/vuln/399388 cna@vuldb.com
- https://vuldb.com/vuln/399388/cti cna@vuldb.com