PyJWT accepts unknown `crit` header extensions (RFC 7515 §4.1.11 MUST violation)
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.5epss 0.3%
probabilidade de exploração
0.3%top 81% das CVEs
exploração observada
nãonenhuma fonte reporta
PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Produtos afetados
jpadilla · pyjwtReferências
https://access.redhat.com/errata/RHSA-2026:10140https://access.redhat.com/errata/RHSA-2026:10141https://access.redhat.com/errata/RHSA-2026:10184https://access.redhat.com/errata/RHSA-2026:12176https://access.redhat.com/errata/RHSA-2026:13508https://access.redhat.com/errata/RHSA-2026:13512https://access.redhat.com/errata/RHSA-2026:13545https://access.redhat.com/errata/RHSA-2026:13553https://access.redhat.com/errata/RHSA-2026:13672https://access.redhat.com/errata/RHSA-2026:13916https://access.redhat.com/errata/RHSA-2026:17083https://access.redhat.com/errata/RHSA-2026:19138