CVE-2026-26717 - CERT CVE
ID CVE-2026-26717
Sažetak 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
Reference
CVSS
Base: 4.8
Impact: 2.5
Exploitability:2.2
Pristup
VektorSloženostAutentikacija
NETWORK HIGH NONE
Impact
PovjerljivostCjelovitostDostupnost
LOW LOW NONE
CVSS vektor CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Zadnje važnije ažuriranje 27-02-2026 - 14:06
Objavljeno 25-02-2026 - 17:25