What’s Vulnerable › Vulnerabilities

CVE-2026-94114: Apache Commons BCEL: Class repositories cache class files under their self-declared names, enabling cache poisoning

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-08
• Weakness: CWE-386

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.

Affected products

• Apache Software Foundation Apache Commons BCEL: before 6.13.0 — fixed in 6.13.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Commons BCEL 6.13.0. Check the vendor advisory for mitigations.

References

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

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