CVE-2026-86231
LowCVSS 3.7Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
Vulnerability in mwiede jsch up to version 2.28.5. The getRevokedKeys function in KnownHosts.java is vulnerable to improper check for certificate revocation via the known_hosts argument. The attack can be performed remotely but has high complexity and is difficult to exploit. Upgrading to version 2.28.6 is recommended.
Risk Assessment
Risk of accepting revoked certificates, potentially leading to unauthorized access.
Recommendation
Upgrade mwiede jsch to version 2.28.6 or apply the available patch.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

