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

INFO

Published Date :

2026-02-25T00:00:00.000Z

Last Modified :

2026-02-26T19:11:04.934Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2026-26717 vulnerability.

Vendors Products
Openfun
  • Richie
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-26717.

URL Resource
https://github.com/Rickidevs/CVE-2026-26717 cve-icon cve-icon
https://github.com/openfun/richie/commit/a1b5bbda3403d7debb466c303a32852925fcba5f cve-icon cve-icon
https://medium.com/@ordogh/cve-2026-26717-hmac-timing-attack-in-openfun-richie-lms-f04377efe83d?postPublishedType=repub cve-icon cve-icon
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