Advisory severityCritical9.8Apache Software Foundation

Critical [CVE-2026-88920] authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key

This critical-severity Apache Software Foundation advisory covers CVE-2026-88920; related products: Apache WSS4J.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-88920 Source published Sep 30, 2026Source updated Sep 30, 2026

VulniPulse record published Sep 30, 2026Record updated Sep 30, 2026

CVE-2026-88920

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Summary

An authentication bypass in the DOM security processor in Apache WSS4J allows unauthenticated remote attackers to forge authenticated SOAP messages via a crafted unsigned SAML sender-vouches assertion containing an attacker-controlled key.

Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

Affected versions

Apache WSS4J 4.0.0 before 4.0.2
Apache WSS4J 3.0.0 before 3.0.6
Apache WSS4J before 2.4.4

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions

4.0.2
3.0.6
2.4.4

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-88920 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-88920NVD CVE.org MITRE

Official resources

ASF Security — reporting & CVE process
Official documentation
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Apache project downloads (fixed releases)
Official documentation
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