High [CVE-2026-95616] integer overflow in WSS4J's DER bounds check lets an oversized allocation pass validation
This high-severity Apache Software Foundation advisory covers CVE-2026-95616; related products: Apache WSS4J.
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Summary
An integer overflow in WSS4J's DER bounds check lets an oversized allocation pass validation.
An unauthenticated attacker can send a SOAP message carrying an X.509 certificate whose SubjectKeyIdentifier extension declares a length of 0x7FFFFFFF; WSS4J decodes this while resolving the signature's key reference, before the message is authenticated, so an eleven-byte extension triggers a 2 GB allocation. Repeated requests exhaust server memory.
Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
Affected product named by the advisory: Apache WSS4J.
- Apache WSS4J 4.0.0 before 4.0.2
- Apache WSS4J 3.0.0 before 3.0.6
- Apache WSS4J before 2.4.4
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
- 4.0.2
- 3.0.6
- 2.4.4
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
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