Vulnerability Details CVE-2026-102269
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 token. This issue is fixed in version 2.14.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 8.0%
CVSS Severity
CVSS v3 Score 4.8
References
Products affected by CVE-2026-102269
-
cpe:2.3:a:pyjwt_project:pyjwt:0.1.6
-
cpe:2.3:a:pyjwt_project:pyjwt:0.1.9
-
cpe:2.3:a:pyjwt_project:pyjwt:0.2.0
-
cpe:2.3:a:pyjwt_project:pyjwt:0.2.2
-
cpe:2.3:a:pyjwt_project:pyjwt:0.2.3
-
cpe:2.3:a:pyjwt_project:pyjwt:0.3.0
-
cpe:2.3:a:pyjwt_project:pyjwt:0.3.1
-
cpe:2.3:a:pyjwt_project:pyjwt:0.3.2
-
cpe:2.3:a:pyjwt_project:pyjwt:0.4.0
-
cpe:2.3:a:pyjwt_project:pyjwt:0.4.1
-
cpe:2.3:a:pyjwt_project:pyjwt:0.4.2
-
cpe:2.3:a:pyjwt_project:pyjwt:0.4.3
-
cpe:2.3:a:pyjwt_project:pyjwt:1.0.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.0.1
-
cpe:2.3:a:pyjwt_project:pyjwt:1.1.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.2.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.3.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.4.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.4.1
-
cpe:2.3:a:pyjwt_project:pyjwt:1.4.2
-
cpe:2.3:a:pyjwt_project:pyjwt:1.5.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.5.1
-
cpe:2.3:a:pyjwt_project:pyjwt:1.5.2
-
cpe:2.3:a:pyjwt_project:pyjwt:1.5.3
-
cpe:2.3:a:pyjwt_project:pyjwt:1.6.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.6.1
-
cpe:2.3:a:pyjwt_project:pyjwt:1.6.3
-
cpe:2.3:a:pyjwt_project:pyjwt:1.6.4
-
cpe:2.3:a:pyjwt_project:pyjwt:1.7.0
-
cpe:2.3:a:pyjwt_project:pyjwt:1.7.1
-
cpe:2.3:a:pyjwt_project:pyjwt:2.0.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.0.1
-
cpe:2.3:a:pyjwt_project:pyjwt:2.1.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.10.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.10.1
-
cpe:2.3:a:pyjwt_project:pyjwt:2.11.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.12.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.12.1
-
cpe:2.3:a:pyjwt_project:pyjwt:2.13.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.2.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.3.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.4.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.5.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.6.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.7.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.8.0
-
cpe:2.3:a:pyjwt_project:pyjwt:2.9.0