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[pkg-vuln] CVE-2026-101917 in pyjwt@2.13.0 #898

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opened 2026-09-30 06:01:59 +00:00 by kert · 0 comments
kert commented 2026-09-30 06:01:59 +00:00
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Severity: MEDIUM
Package: pyjwt @ 2.13.0
Fixed in: 2.14.0

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 e

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-101917

**Severity:** MEDIUM **Package:** `pyjwt` @ `2.13.0` **Fixed in:** `2.14.0` 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 e **Reference:** https://nvd.nist.gov/vuln/detail/CVE-2026-101917
kert added this to the P21: Package Supply Chain — inventory, mirrors, drift, vuln scanning milestone 2026-09-30 06:01:59 +00:00
kert added the qualityci labels 2026-09-30 06:01:59 +00:00
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Reference: homelab/stack#898
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