CVE-2026-86231

Description

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.

References

https://vuldb.com/vuln/399388/cti

https://vuldb.com/vuln/399388

https://vuldb.com/submit/898485

https://vuldb.com/cve/CVE-2026-86231

https://github.com/mwiede/jsch/releases/tag/jsch-2.28.6

https://github.com/mwiede/jsch/pull/1098

https://github.com/mwiede/jsch/issues/1091

https://github.com/mwiede/jsch/commit/194a2f76a5c0f1c3f778565be3fd66bcafc42d23

https://github.com/mwiede/jsch/

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS