CVE-2026-102271

Katalog CVE

CVSS 7.4 · High EPSS 0,18%

Kerentanan Improper Verification of Cryptographic Signature pada pyjwt project pyjwt. Skor CVSS 3.1 7.4 (High) menurut github.com.

Deskripsi (NVD)

PyJWT is a Python implementation of JSON Web Token standards. From 2.4.0 until 2.14.0, PyJWT HMACAlgorithm.prepare_key is affected because asymmetric-key guard relies on textual markers that are absent from DER encoding. This occurs when an application mixes HMAC and asymmetric algorithms and supplies a DER public key as the shared verification key. As a result, PyJWT uses public DER bytes 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

6 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

7.4 (High), sumber github.com
CVSS:3.1/AV:N/AC:H/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)

0,18% peluang dieksploitasi; lebih tinggi dari 7,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/jpadilla/pyjwt/security/advisories/GHSA-p4g4-x82p-q773 exploit · patch · advisory vendor
• https://github.com/jpadilla/pyjwt/commit/2798504fa2663364573cf2d1043d8d7fef389499 patch
• https://github.com/jpadilla/pyjwt/releases/tag/2.14.0 product · release notes