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[pkg-vuln] CVE-2026-102269 in pyjwt@2.13.0 #900

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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 signature segment is affected because signature segment decoding accepts characters outside the canonical Base64URL representation. This occurs when non-Base64URL characters are appended to a valid compact JWS signature segment. As a result, base64url_decode produces the same signature bytes for different serialized segments. Consequently, raw-token revocation checks can fail to recognize an equivalent modified

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-102269

**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 signature segment is affected because signature segment decoding accepts characters outside the canonical Base64URL representation. This occurs when non-Base64URL characters are appended to a valid compact JWS signature segment. As a result, base64url_decode produces the same signature bytes for different serialized segments. Consequently, raw-token revocation checks can fail to recognize an equivalent modified **Reference:** https://nvd.nist.gov/vuln/detail/CVE-2026-102269
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#900
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