CVE-2026-102268

Katalog CVE

CVSS 9.1 · Critical EPSS 0,20%

Kerentanan Improper Verification of Cryptographic Signature pada pyjwt project pyjwt. Skor CVSS 3.1 9.1 (Critical) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

28 September 2026

Terakhir diubah

7 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

9.1 (Critical), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-347: Improper Verification of Cryptographic Signature

EPSS (30 hari)

0,20% peluang dieksploitasi; lebih tinggi dari 9,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-ffc3-869f-jxw9 exploit · advisory vendor
• https://github.com/jpadilla/pyjwt/commit/8b4e233a22206b34ec1186e912e75c0b2396ac07 patch
• https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 product · release notes