OpenFUN Richie Observable Timing Discrepancy in its sync_course_run_from_request function

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

EUVD-2026-8680

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

GHSA-XJHR-FM27-4HMX OpenFUN Richie Observable Timing Discrepancy in its sync_course_run_from_request function

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

CVE-2026-26717

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

CVE-2026-26717

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

PT-2026-21958

Name of the Vulnerable Software and Affected Versions OpenFUN Richie LMS affected versions not specified Description The application uses a non-constant time comparison operator for HMAC signature verification within the sync course run from request function, located in...

CVE-2026-26717

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

CVE-2026-26717

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 synccourserunfromrequest function. This allows remote attackers to forge valid signatures and bypass authentication by measuring response...

CVE-2026-26717

OpenFUN Richie (LMS) is affected. The issue is in src/richie/apps/courses/api.py: sync_course_run_from_request uses a non-constant time == operator for HMAC signature verification, enabling timing-based forgery of valid signatures and authentication bypass. Documented in Red Hat/Snyk advisories w...