CVE-2026-86231mwiede jsch KnownHosts.java getRevokedKeys improper check for certificate revocation
Updated under an hour ago ()
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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
- 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-299, CWE-298
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mwiede jsch mwiede:jsch | 2.28.0; 2.28.1; 2.28.2; 2.28.3; 2.28.4; 2.28.5; 2.28.6 not affected | CNA record |
References
- https://vuldb.com/vuln/399388vdb-entry, technical-description
- https://vuldb.com/vuln/399388/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-86231third-party-advisory
- https://vuldb.com/submit/898485third-party-advisory
- https://github.com/mwiede/jsch/issues/1091exploit, issue-tracking
- https://github.com/mwiede/jsch/pull/1098issue-tracking, patch
- https://github.com/mwiede/jsch/commit/194a2f76a5c0f1c3f778565be3fd66bcafc42d23patch
- https://github.com/mwiede/jsch/releases/tag/jsch-2.28.6patch
- https://github.com/mwiede/jsch/product
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.