passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending

{
  "id": "98b81a73fed2f59721d42d2271f035a494f70ff80c11d1ff5f922df2e3ada199",
  "url": "https://osv.dev/vulnerability/CVE-2026-89043",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "passport-saml-encrypted through 0.1.13 XML Signature Wrapping via Assertion Prepending",
    "summary": "passport-saml-encrypted through 0.1.13 contains an XML signature wrapping vulnerability where signature verification and assertion extraction use independent XPath lookups with no cross-validation. Attackers holding any validly signed SAML message can prepend a forged unsigned assertion that gets accepted as the verified identity while the genuine signature validates against the original assertion.",
    "evidence": "osv:CVE-2026-89043",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-89043",
      "aliases": [
        "CVE-2026-89043"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/krakenjs/passport-saml-encrypted",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "1ab28eb11928d66d50af8f231ccb71f7c1923fda"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.1.13"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.1.13"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.1.12",
            "v0.1.13",
            "v0.1.13-beta.1",
            "v0.1.11",
            "v0.1.10",
            "v0.1.9",
            "v0.1.6",
            "v0.1.5",
            "v0.1.4",
            "v0.1.3",
            "v0.1.1",
            "v0.1.0",
            "v0.0.4",
            "v0.0.3",
            "v0.0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89043.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.119940869Z",
      "provider": "osv",
      "references": [
        "https://www.npmjs.com/package/passport-saml-encrypted",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89043.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-89043",
        "https://www.vulncheck.com/advisories/passport-saml-encrypted-through-0.1.13-xml-signature-wrapping-via-assertion-prepending",
        "https://github.com/krakenjs/passport-saml-encrypted/issues/30",
        "https://github.com/krakenjs/passport-saml-encrypted",
        "https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L256",
        "https://github.com/krakenjs/passport-saml-encrypted/blob/v0.1.13/lib/saml.js#L328"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-347"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89043.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-89043",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519866,
  "published_at": "2026-09-10T17:39:33.458+00:00"
}