CVE-2026-49852

Katalog CVE

CVSS 8.7 · High EPSS 0,19%

Kerentanan Improper Authentication. Skor CVSS 4.0 8.7 (High) menurut github.com.

Deskripsi (NVD)

joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/_rfc7518/jws_algs.py pass the output of OctKey.get_op_key(...) to hmac.new(...) and OctKey.import_key in src/joserfc/_rfc7518/oct_key.py only emits a SecurityWarning for keys shorter than 14 bytes without rejecting zero-length input. This issue is fixed in version 1.6.8.

Rincian

Terbit di NVD

17 Juli 2026

Terakhir diubah

23 Juli 2026

Status NVD

Deferred

CVSS 4.0

8.7 (High), sumber github.com
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-287: Improper Authentication
CWE-326: Inadequate Encryption Strength
CWE-1391: Use of Weak Credentials

EPSS (30 hari)

0,19% peluang dieksploitasi; lebih tinggi dari 8,4% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/authlib/joserfc/commit/86d00910b2b2d2d07503fee9b572906daefab7f1
• https://github.com/authlib/joserfc/releases/tag/1.6.8
• https://github.com/authlib/joserfc/security/advisories/GHSA-gg9x-qcx2-xmrh