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

Vulnerability from cvelistv5 – Published: 2026-09-30 11:58 – Updated: 2026-09-30 12:12
VLAI
Title
Apache WSS4J: SAML Sender-Vouches Authentication Bypass
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
Credits
Reported by n0mi1k
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-09-30T12:12:22.214Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/09/30/10"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.wss4j:wss4j-ws-security-dom",
          "packageURL": "pkg:maven/org.apache.wss4j/wss4j-ws-security-dom",
          "product": "Apache WSS4J",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "4.0.2",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.6",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "2.4.4",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Reported by n0mi1k"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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.\u003cbr\u003e\u003cbr\u003eUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue."
            }
          ],
          "value": "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.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "important"
            },
            "type": "Textual description of severity"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T11:58:00.040Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache WSS4J: SAML Sender-Vouches Authentication Bypass",
      "x_generator": {
        "engine": "Vulnogram 1.0.3"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-88920",
    "datePublished": "2026-09-30T11:58:00.040Z",
    "dateReserved": "2026-09-10T13:32:10.370Z",
    "dateUpdated": "2026-09-30T12:12:22.214Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://repo.maven.apache.org/maven2",
                "defaultStatus": "unaffected",
                "packageName": "org.apache.wss4j:wss4j-ws-security-dom",
                "packageURL": "pkg:maven/org.apache.wss4j/wss4j-ws-security-dom",
                "product": "Apache WSS4J",
                "vendor": "Apache Software Foundation",
                "versions": [
                  {
                    "lessThan": "4.0.2",
                    "status": "affected",
                    "version": "4.0.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "3.0.6",
                    "status": "affected",
                    "version": "3.0.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "2.4.4",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@apache.org"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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.\n\nUsers are recommended to upgrade to versions 4.0.2 or 3.0.6 or 2.4.4, which fix this issue."
          }
        ],
        "id": "CVE-2026-88920",
        "lastModified": "2026-09-30T16:14:10.347",
        "metrics": {},
        "published": "2026-09-30T12:17:14.203",
        "references": [
          {
            "source": "security@apache.org",
            "url": "https://lists.apache.org/thread.html/grt43m3bgbzz0mk0cnho3rcybb1j01z9"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "http://www.openwall.com/lists/oss-security/2026/09/30/10"
          }
        ],
        "sourceIdentifier": "security@apache.org",
        "vulnStatus": "Awaiting Analysis"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-30T14:04:41+00:00",
      "cve": "CVE-2026-88920",
      "id": "CVE-2026-88920",
      "initial_release_date": "2026-09-30T11:58:00.040000+00:00",
      "product_status:known_affected": "10",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "org.apache.wss4j/wss4j-ws-security-dom: Apache WSS4J: Authentication bypass via unsigned SAML sender-vouches assertion",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88920.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.