{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87004", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-08T16:44:23.782Z", "datePublished": "2026-09-30T17:01:24.963Z", "dateUpdated": "2026-09-30T18:01:20.063Z"}, "containers": {"cna": {"title": "Tugtainer: OIDC id_token claims accepted without signature/audience/expiry verification", "problemTypes": [{"descriptions": [{"cweId": "CWE-347", "lang": "en", "description": "CWE-347: Improper Verification of Cryptographic Signature", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh"}, {"name": "https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4", "tags": ["x_refsource_MISC"], "url": "https://github.com/Quenary/tugtainer/commit/b55269b6a3bfd43b0f2f5bd5f137ee0c81b7c2e4"}, {"name": "https://github.com/Quenary/tugtainer/releases/tag/v1.31.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/Quenary/tugtainer/releases/tag/v1.31.3"}], "affected": [{"vendor": "Quenary", "product": "tugtainer", "versions": [{"version": "< 1.31.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-30T17:01:24.963Z"}, "descriptions": [{"lang": "en", "value": "Tugtainer is a self-hosted app for automating updates of Docker containers. Prior to version 1.31.3, when the OIDC login flow completes, backend/modules/auth/providers/auth_oidc_provider.py decodes the id_token returned by the identity provider's token endpoint using jose.jwt.get_unverified_claims() instead of jwt.decode(). This skips signature verification, audience (aud) validation, issuer (iss) validation, and expiry (exp) checking entirely. The extracted claims (email/sub/preferred_username) are then used directly as the user_id for the resulting Tugtainer session. This issue has been patched in version 1.31.3."}], "source": {"advisory": "GHSA-crjc-6vc7-xrfh", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/Quenary/tugtainer/security/advisories/GHSA-crjc-6vc7-xrfh", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-30T18:00:13.050961Z", "id": "CVE-2026-87004", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-30T18:01:20.063Z"}}]}}

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