Vulnerability-Lookup

GHSA-4C9G-74H5-78R7

Vulnerability from github – Published: 2026-09-30 12:35 – Updated: 2026-09-30 15:31

Details

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.

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  "affected": [],
  "aliases": [
    "CVE-2026-88920"
  ],
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    "github_reviewed": false,
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  "id": "GHSA-4c9g-74h5-78r7",
  "modified": "2026-09-30T15:31:21Z",
  "published": "2026-09-30T12:35:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88920"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/30/10"
    }
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  "schema_version": "1.4.0",
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}

CVE-2026-88920 (GCVE-0-2026-88920)

Vulnerability from cvelistv5 – Published: 2026-09-30 11:58 – Updated: 2026-09-30 19:48

Title

Apache WSS4J: SAML Sender-Vouches Authentication Bypass

Summary

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 19:48 UTC

CWE

CWE-287 - Improper Authentication

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread.html/grt43m3bgbzz…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache WSS4J	Affected: 4.0.0 , < 4.0.2 (semver) Affected: 3.0.0 , < 3.0.6 (semver) Affected: 0 , < 2.4.4 (semver)

Credits

Reported by n0mi1k

Show details on NVD website

JSON

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              "confidentialityImpact": "HIGH",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-4C9G-74H5-78R7

CVE-2026-88920 (GCVE-0-2026-88920)

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