CVE-2026-95616
Apache WSS4J: Unauthenticated denial of service via integer overflow in DER parsing of X.509 certificate extensions
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | apache software foundation |
| Product | apache wss4j |
| Published | Sep 30, 2026 |
| Last Updated | Sep 30, 2026 |
Stay Ahead of the Next One
Get instant alerts for apache software foundation apache wss4j
Be the first to know when new high vulnerabilities affecting apache software foundation apache wss4j are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Apache Software Foundation / Apache WSS4J
4.0.0 < 4.0.2 3.0.0 < 3.0.6 0 < 2.4.4