CVE-2026-123798 (GCVE-0-2026-123798)

Vulnerability from cvelistv5 – Published: 2026-11-09 18:04 – Updated: 2026-11-09 18:04
VLAI
Title
SuperTokens Core: SAML XML Signature Wrapping authentication bypass — any IdP user can authenticate as any other user
Summary
SuperTokens Core is an open source authentication server. From 11.3.0 until 11.3.7, 11.4.7, and 12.0.10, SAML.verifySamlResponseSignature calls OpenSAML SignatureValidator.validate without first applying SAMLSignatureProfileValidator. The Core can therefore accept a cryptographically valid signature that references a different XML element from the Response or Assertion whose NameID and attributes are used for authentication. An ordinary user of the configured identity provider can move a genuinely signed element elsewhere in the document while supplying an attacker-authored identity-bearing element, causing XML Signature Wrapping authentication as another IdP user. Both response-level and assertion-level signing paths are affected, and SP-initiated login remains reachable without enabling allowIDPInitiatedLogin. This issue is fixed in versions 11.3.7, 11.4.7, and 12.0.10.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
supertokens supertokens-core Affected: >= 12.0.6, < 12.0.10
Affected: >= 11.4.0, < 11.4.7
Affected: >= 11.3.0, < 11.3.7
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "supertokens-core",
          "vendor": "supertokens",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 12.0.6, \u003c 12.0.10"
            },
            {
              "status": "affected",
              "version": "\u003e= 11.4.0, \u003c 11.4.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 11.3.0, \u003c 11.3.7"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SuperTokens Core is an open source authentication server. From 11.3.0 until 11.3.7, 11.4.7, and 12.0.10, SAML.verifySamlResponseSignature calls OpenSAML SignatureValidator.validate without first applying SAMLSignatureProfileValidator. The Core can therefore accept a cryptographically valid signature that references a different XML element from the Response or Assertion whose NameID and attributes are used for authentication. An ordinary user of the configured identity provider can move a genuinely signed element elsewhere in the document while supplying an attacker-authored identity-bearing element, causing XML Signature Wrapping authentication as another IdP user. Both response-level and assertion-level signing paths are affected, and SP-initiated login remains reachable without enabling allowIDPInitiatedLogin. This issue is fixed in versions 11.3.7, 11.4.7, and 12.0.10."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T18:04:20.419Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/supertokens/supertokens-core/security/advisories/GHSA-gvx2-mwmj-wwvj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/supertokens/supertokens-core/security/advisories/GHSA-gvx2-mwmj-wwvj"
        },
        {
          "name": "https://github.com/supertokens/supertokens-core/commit/8d06b0cfb5409c5bf505051ddfcb94d66367caae",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/supertokens/supertokens-core/commit/8d06b0cfb5409c5bf505051ddfcb94d66367caae"
        },
        {
          "name": "https://github.com/supertokens/supertokens-core/commit/9cba541ae2ed87b878d11b257bc9b8b78341f50a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/supertokens/supertokens-core/commit/9cba541ae2ed87b878d11b257bc9b8b78341f50a"
        },
        {
          "name": "https://github.com/supertokens/supertokens-core/commit/d0773f2a6497411aeda5d4f03d3d135a2a3ae79c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/supertokens/supertokens-core/commit/d0773f2a6497411aeda5d4f03d3d135a2a3ae79c"
        },
        {
          "name": "https://github.com/supertokens/supertokens-core/releases/tag/v11.3.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/supertokens/supertokens-core/releases/tag/v11.3.7"
        },
        {
          "name": "https://github.com/supertokens/supertokens-core/releases/tag/v11.4.7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/supertokens/supertokens-core/releases/tag/v11.4.7"
        },
        {
          "name": "https://github.com/supertokens/supertokens-core/releases/tag/v12.0.10",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/supertokens/supertokens-core/releases/tag/v12.0.10"
        }
      ],
      "source": {
        "advisory": "GHSA-gvx2-mwmj-wwvj",
        "discovery": "UNKNOWN"
      },
      "title": "SuperTokens Core: SAML XML Signature Wrapping authentication bypass \u2014 any IdP user can authenticate as any other user"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-123798",
    "datePublished": "2026-11-09T18:04:20.419Z",
    "dateReserved": "2026-11-06T15:27:56.225Z",
    "dateUpdated": "2026-11-09T18:04:20.419Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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