CVE-2026-26717

Katalog CVE

CVSS 4.8 · Medium EPSS 0,51%

Kerentanan Observable Timing Discrepancy. Skor CVSS 3.1 4.8 (Medium) menurut CISA ADP.

Deskripsi (NVD)

An issue in OpenFUN Richie (LMS) in src/richie/apps/courses/api.py. The application used the non-constant time == operator for HMAC signature verification in the sync_course_run_from_request function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response time discrepancies

Rincian

Terbit di NVD

25 Februari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Deferred

CVSS 3.1

4.8 (Medium), sumber CISA ADP
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-208: Observable Timing Discrepancy

EPSS (30 hari)

0,51% peluang dieksploitasi; lebih tinggi dari 41,7% 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/Rickidevs/CVE-2026-26717
• https://github.com/openfun/richie/commit/a1b5bbda3403d7debb466c303a32852925fcba5f
• https://medium.com/@ordogh/cve-2026-26717-hmac-timing-attack-in-openfun-richie-lms-f04377efe83d?postPublishedT...