What is CVE-2026-31946?

CVE-2026-31946 is a critical-severity vulnerability in Openolat, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-03-30.

How severe is CVE-2026-31946?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Openolat

CVE-2026-31946

OpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. From version 10.5.4 to before version 20.2.5, OpenOLAT's OpenID Connect implicit flow implementation does not verify JWT signatu…

Vulnerability class: Broken Authentication

EPSS: 0.000 (8.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Openolat — versions >= 10.5.4, < 20.2.5

Weakness classification (CWE)

CWE-287 — Improper Authentication
CWE-347 — Improper Verification of Cryptographic Signature

References

https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-v8vp-x4q4-2vch (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-31946?: CVE-2026-31946 is a critical-severity vulnerability in Openolat, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-03-30.
How severe is CVE-2026-31946?: Critical severity. CVSS v3 base score is 9.8 out of 10.