CVE-2026-26717

CVSS 4.8 MEDIUMEPSS 0.4%CWE-208

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 4.8EPSS 0.4%KEV nãoPoC —Patch —

Ciclo de vida

25 fev 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Produtos afetados

n/a · n/a

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Referências

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