{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-101917", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-28T15:55:37.908Z", "datePublished": "2026-09-28T20:07:44.237Z", "dateUpdated": "2026-09-28T20:35:25.908Z"}, "containers": {"cna": {"title": "PyJWT: PyJWKClient still amplifies unauthenticated JWKS fetches on unknown kid values (incomplete fix of CVE-2026-48524)", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q"}, {"name": "https://github.com/jpadilla/pyjwt/commit/ba4853a75fb9676362da17f67d0f64bd18afd4e1", "tags": ["x_refsource_MISC"], "url": "https://github.com/jpadilla/pyjwt/commit/ba4853a75fb9676362da17f67d0f64bd18afd4e1"}, {"name": "https://github.com/jpadilla/pyjwt/releases/tag/2.14.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/jpadilla/pyjwt/releases/tag/2.14.0"}], "affected": [{"vendor": "jpadilla", "product": "pyjwt", "versions": [{"version": "< 2.14.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-28T20:07:44.237Z"}, "descriptions": [{"lang": "en", "value": "PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT get_signing_key_from_jwt is affected because unknown kid misses force refreshes without a negative cache or minimum refresh interval. This occurs when unauthenticated tokens repeatedly use the same unknown kid or varying kid values absent from the cached JWKS. As a result, each cache miss causes PyJWKClient to refresh the JWKS. Consequently, attacker traffic can amplify outbound requests to the configured JWKS endpoint. This issue is fixed in version 2.14.0."}], "source": {"advisory": "GHSA-2gx3-rcp4-g85q", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-2gx3-rcp4-g85q", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-28T20:35:19.525335Z", "id": "CVE-2026-101917", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"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": "2026-09-28T20:35:25.908Z"}}]}}

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