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TI-2026-63654 Aliases CVE-2026-95616GHSA-9gjf-54jg-6353

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

Priority LOW 39CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00409 35th percentileScored 2026-11-07
Fix Partial Apache WSS4J (Apache Software Foundation): 4.0.2, 3.0.6, 2.4.4Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache WSS4J4.0.0 to before 4.0.2; 3.0.0 to before 3.0.6; before 2.4.44.0.2, 3.0.6, 2.4.4Patch availableCNA
  • Apache WSS4J VendorApache Affected 4.0.0 to before 4.0.2; 3.0.0 to before 3.0.6; before 2.4.4 Fixed in 4.0.2, 3.0.6, 2.4.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:wss4j:*:*:*:*:*:*:*:*before 2.4.4; 3.0.0 to before 3.0.6; 4.0.0 to before 4.0.2VulnerableApache
  • cpe:2.3:a:apache:wss4j:*:*:*:*:*:*:*:* Versions before 2.4.4; 3.0.0 to before 3.0.6; 4.0.0 to before 4.0.2 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache WSS4J (Apache Software Foundation) Fixed in 4.0.2, 3.0.6, 2.4.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache WSS4J 2.4.4, 3.0.6, 4.0.2

    7 records Highest priority Priority MEDIUM 5 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-60291 Apache WSS4J: SAML Sender-Vouches Authentication BypassPriority MEDIUM 50
    • TI-2026-60412 Apache WSS4J: WSS4J EncryptedHeader child confusion causing wrong protected-header selectionPriority MEDIUM 47
    • TI-2026-59946 Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks.Priority MEDIUM 47
    Show all 7 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss Enterprise Application Platform 7AffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 8AffectedNo fix yet
Red Hat JBoss Enterprise Application Platform Expansion PackAffectedNo fix yet

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-95616
  2. 2026-10-03 Alias added: GHSA-9gjf-54jg-6353
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat
  5. 2026-11-07 Affected versions changed · Red Hat

References

Advisory 2

  • TI-2020-10913 Velocity Sandbox Bypass CVSS 3.1HIGH 8.8
  • TI-2026-60291 Apache WSS4J: SAML Sender-Vouches Authentication Bypass CVSS 3.1CRITICAL 9.8
  • TI-2026-60412 Apache WSS4J: WSS4J EncryptedHeader child confusion causing wrong protected-header selection CVSS 3.1CRITICAL 9.1
  • TI-2026-59946 Apache WSS4J: Streaming WS-SecurityPolicy validation may skip element-protection checks. CVSS 3.1CRITICAL 9.1
  • TI-2015-00198 Apache WSS4J before 1.6.17 and 2.0.x before 2.0.2 improperly leaks information about… CVSS 3.0HIGH 7.5
  • TI-2026-62217 Apache WSS4J: WS-SecurityPolicy signature checks skipped in the streaming code after an STR-Transform reference CVSS 3.1HIGH 7.5
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences