CVE-2026-26717 | THREATINT

Description

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

PUBLISHED Reserved 2026-02-16 | Published 2026-02-25 | Updated 2026-02-26 | Assigner mitre

References

github.com/...ommit/a1b5bbda3403d7debb466c303a32852925fcba5f

github.com/Rickidevs/CVE-2026-26717

medium.com/...ichie-lms-f04377efe83d?postPublishedType=repub

cve.org (CVE-2026-26717)

nvd.nist.gov (CVE-2026-26717)

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