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[pkg-vuln] CVE-2026-102270 in pyjwt@2.13.0 #911

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opened 2026-10-01 06:01:53 +00:00 by kert · 0 comments
kert commented 2026-10-01 06:01:53 +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 is_pem_format is affected because lazy PEM regular expression backtracks extensively. This occurs when a certificate-like input contains repeated BEGIN markers without a matching END marker. As a result, is_pem_format performs unbounded backtracking while searching for a PEM end marker. Consequently, an attacker can cause intensive CPU consumption. This issue is fixed in version 2.14.0.

Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-102270

**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 is_pem_format is affected because lazy PEM regular expression backtracks extensively. This occurs when a certificate-like input contains repeated BEGIN markers without a matching END marker. As a result, is_pem_format performs unbounded backtracking while searching for a PEM end marker. Consequently, an attacker can cause intensive CPU consumption. This issue is fixed in version 2.14.0. **Reference:** https://nvd.nist.gov/vuln/detail/CVE-2026-102270
kert added this to the P21: Package Supply Chain — inventory, mirrors, drift, vuln scanning milestone 2026-10-01 06:01:53 +00:00
kert added the qualityci labels 2026-10-01 06:01:53 +00:00
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Reference: homelab/stack#911
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