CVE-2026-95616
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Wss4j
PublishedSep 30, 2026
First seenSep 30, 2026
Weakness typeCWE-190Integer overflow
How to fix
Update
- apache wss4j2.4.4, 3.0.6, 4.0.2 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache wss4j | v < 2.4.4, 3.0.0 ≤ v < 3.0.6, 4.0.0 ≤ v < 4.0.2 | 2.4.4, 3.0.6, 4.0.2 |
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