CVE-2026-95616Apache WSS4J: Unauthenticated denial of service via integer overflow in DER parsing of X.509 certificate extensions
Updated under an hour ago ()
Does this affect you?
It affects Apache Software Foundation Apache WSS4J and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.41%, higher than 33% of scored CVEs.
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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.
- CVSS
- 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.41% (percentile 33)
- Assigned by
- apache
- NVD analysis
- Analyzed
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apache Software Foundation Apache WSS4J apache_software_foundation:apache_wss4j (from the name) | from 4.0.0 before 4.0.2; from 3.0.0 before 3.0.6; before 2.4.4 | CNA record |
apache wss4j apache:wss4j | before 2.4.4; from 3.0.0 before 3.0.6; from 4.0.0 before 4.0.2 | NVD |
References
- https://lists.apache.org/thread.html/sdf0fsphkg4qbj7nh2brjgwvcmd67hctvendor-advisory, mailing-list
- http://www.openwall.com/lists/oss-security/2026/09/30/14mailing-list, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.