> CVE-2026-102268 [CRITICAL]

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PUBLISHED
2026-09-28 21:17
MODIFIED
2026-09-28 21:17
CVSS_SCORE V3
9.1
EPSS (Prob. Exploit)
0.20%
Top 90.4%
DATA SOURCES:
NVD đź”— 2026-09-28 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-22 GITHUB đź”— 2026-10-15 MSRC đź”— 2026-10-03

> DESCRIPTION

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, is_pem_format in jwt/utils.py is affected because is_pem_format does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and supplies a mutated public-key PEM as raw key bytes. As a result, HMACAlgorithm.prepare_key treats the unrecognized asymmetric public key as an HMAC secret. Consequently, an attacker who knows the public key can forge authenticated HMAC tokens. This issue is fixed in version 2.14.0.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EXPLOITABILITY
3.9
IMPACT
5.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-347

> CWE DETAILED DESCRIPTIONS

CWE-347: Improper Verification of Cryptographic Signature - The product does not verify, or incorrectly verifies, the cryptographic signature for data.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat AI Inference Tech Preview 3.5.2 (Gaudi)
Red Hat AI Inference Tech Preview 3.5.2 (Gaudi) is now available.
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (ROCm)
Red Hat AI Inference 3.5.2 (ROCm) is now available.
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cpu)
Red Hat AI Inference 3.5.2 (cpu) is now available.
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (spyre)
Red Hat AI Inference 3.5.2 (spyre) is now available.
Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cuda)
Red Hat AI Inference 3.5.2 (cuda) is now available.
Red Hat Security Advisory: RHTAS 1.4.4 - Release of Model Transparency 1.0.5
Release of the RHTAS Model Transparency CLI image 1.0.5. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.7 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.7
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
An update is now available for Red Hat Ansible Automation Platform 2.6

> GITHUB SECURITY ADVISORY

GHSA-ffc3-869f-jxw9 CRITICAL

PyJWT: Asymmetric-PEM detection bypass: whitespace/line-ending-mutated public keys skip the HS/asymmetric confusion guard

AFFECTED PACKAGES:
PIP / PyJWT
<= 2.13.0
Fixed in: 2.14.0

> HISTORIQUE DES MODIFICATIONS

Première apparition
28/09/2026 21:17
Source: NVD
đź“Š ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-347: Improper Verification of Cryptographic Signature - The product does not verify, or incorrectly verifies, the cryptographic signature for data.
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/jpadilla/pyjwt/commit/8b4e233a22206b34ec1186e912e75c0b2396ac0...
https://github.com/jpadilla/pyjwt/releases/tag/2.14.0
https://github.com/jpadilla/pyjwt/security/advisories/GHSA-ffc3-869f-jxw9
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