Vulnerability in Apache Software Foundation Apache Commons BCEL

[ Description ]Official description

Symbolic name not mapping to correct class. BCEL caches attacker-controlled classes under their self-declared names without validating the requested name, allowing subsequent lookups and name-keyed verification results to refer to a different class. This issue affects Apache Commons BCEL: before 6.13.0. Users are recommended to upgrade to version 6.13.0, which fixes the issue.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3778

  Apache Commons BCEL: Multiple vulnerabilities Translated from German

  CVE-2026-105111CVE-2026-94114

[ References ]References

• github.com/apache/commons-bcel/commit/14890bf2b9014df25f9b4de86f29b5e917e5656b.patch
• lists.apache.org/thread.html/co1wfk2lyrmpnfhn49o370pvfl978rw6
• www.openwall.com/lists/oss-security/2026/10/07/12