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.
History

Tue, 06 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache wss4j
CPEs cpe:2.3:a:apache:wss4j:*:*:*:*:*:*:*:*
Vendors & Products Apache
Apache wss4j

Wed, 30 Sep 2026 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-680

Wed, 30 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-680

Wed, 30 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-190
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Wed, 30 Sep 2026 12:30:00 +0000

Type Values Removed Values Added
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.
Title Apache WSS4J: Unauthenticated denial of service via integer overflow in DER parsing of X.509 certificate extensions
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-09-30T12:25:28.399Z

Updated: 2026-09-30T13:17:31.672Z

Reserved: 2026-09-22T10:04:52.017Z

Link: CVE-2026-95616

cve-icon Vulnrichment

Updated: 2026-09-30T13:17:31.672Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-30T13:17:28.863

Modified: 2026-10-06T17:21:33.233

Link: CVE-2026-95616

cve-icon Redhat

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