CVE-2026-95616
Last modified
CVE-2026-95616 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Wss4j | < 2.4.4 |
| Apache | Wss4j | >= 3.0.0, < 3.0.6 |
| Apache | Wss4j | >= 4.0.0, < 4.0.2 |
References
- https://lists.apache.org/thread.html/sdf0fsphkg4qbj7nh2brjgwvcmd67hctVendor Advisory, Mailing List
- https://www.openwall.com/lists/oss-security/2026/09/30/14Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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