{"affected":[{"product":"supertokens-core","source":"CNA: GitHub_M","vendor":"supertokens","versions":[{"status":"affected","version":">= 12.0.6, < 12.0.10"},{"status":"affected","version":">= 11.4.0, < 11.4.7"},{"status":"affected","version":">= 11.3.0, < 11.3.7"}]}],"cveId":"CVE-2026-123798","cwes":["CWE-287","CWE-347"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.1,"severity":"high","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}],"modifiedAt":1794247460419,"publishedAt":1794247460419,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/supertokens/supertokens-core/security/advisories/GHSA-gvx2-mwmj-wwvj"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/supertokens/supertokens-core/commit/8d06b0cfb5409c5bf505051ddfcb94d66367caae"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/supertokens/supertokens-core/commit/9cba541ae2ed87b878d11b257bc9b8b78341f50a"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/supertokens/supertokens-core/commit/d0773f2a6497411aeda5d4f03d3d135a2a3ae79c"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/supertokens/supertokens-core/releases/tag/v11.3.7"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/supertokens/supertokens-core/releases/tag/v11.4.7"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/supertokens/supertokens-core/releases/tag/v12.0.10"}],"remediation":[],"revision":"79d9c94375905fbc2f8757d00ecce3a51c8eefd244feeb749c7b6353e50d20ed","sources":[{"modifiedAt":1794247460419,"name":"CNA: GitHub_M","retrievedAt":1794251334854,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123798"}],"ssvc":null,"status":"published","title":"SuperTokens Core: SAML XML Signature Wrapping authentication bypass — any IdP user can authenticate as any other user","updatedAt":1794251334854}