Vulnerability in Apache Software Foundation Apache Commons BCEL

[ Description ]Official description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Apache Commons BCEL. This only happens when you're using Class2HTML to generate webpages for possibly-attacker-controlled class files, where Class2HTML emitters write attacker class-file strings into HTML unescaped (stored XSS in reports). 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/fb72c225cbc6ec3d94060ed6edb269f07428d504.patch
• lists.apache.org/thread.html/co1wfk2lyrmpnfhn49o370pvfl978rw6
• www.openwall.com/lists/oss-security/2026/10/07/13