{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103001","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-29T20:46:08.335Z","datePublished":"2026-09-30T21:15:12.862Z","dateUpdated":"2026-10-05T23:47:32.912Z"},"containers":{"cna":{"title":"PyJWT.decode() reintroduces options-dict mutation, enabling silent claim-verification bypass on dict reuse","problemTypes":[{"descriptions":[{"cweId":"CWE-471","lang":"en","description":"CWE-471: Modification of Assumed-Immutable Data (MAID)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q"},{"name":"https://github.com/jpadilla/pyjwt/issues/679","tags":["x_refsource_MISC"],"url":"https://github.com/jpadilla/pyjwt/issues/679"},{"name":"https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35","tags":["x_refsource_MISC"],"url":"https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35"}],"affected":[{"vendor":"jpadilla","product":"pyjwt","versions":[{"version":">= 2.11.0, <= 2.13.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-30T21:17:58.116Z"},"descriptions":[{"lang":"en","value":"PyJWT is a Python implementation of JSON Web Token standards. From 2.11.0 through 2.13.0, PyJWT's PyJWT._merge_options() method can modify a caller-supplied mutable options mapping when verify_signature is false. If an application reuses that same mapping for a later decode() or decode_complete() call and changes verify_signature to true, the mapping can retain false values for expiration, not-before, issued-at, audience, issuer, subject, and JWT ID checks. A signed token with invalid registered claims can then be accepted without disabling signature verification, but applications that create a fresh options mapping for each call are not affected."}],"source":{"advisory":"GHSA-gvp8-978c-rx2q","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-05T23:47:10.360725Z","id":"CVE-2026-103001","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-05T23:47:32.912Z"}}]}}