Apache WSS4J: Unauthenticated denial of service via integer overflow in DER parsing of X.509 certificate extensions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-95616
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-30 13:17:28 UTC
Updated2026-09-30 16:14:10 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-190 | CWE-190 CWE-190 Integer Overflow or Wraparound

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache WSS4J affected 4.0.0 4.0.2 semver Not specified
CNA Apache Software Foundation Apache WSS4J affected 3.0.0 3.0.6 semver Not specified
CNA Apache Software Foundation Apache WSS4J affected 2.4.4 semver Not specified

References

ReferenceSourceLinkTags
lists.apache.org/thread.html/sdf0fsphkg4qbj7nh2brjgwvcmd67hct [email protected] lists.apache.org
www.openwall.com/lists/oss-security/2026/09/30/14 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
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