Is CVE-2026-31946 actively exploited?

No active exploitation of CVE-2026-31946 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31946 be exploited remotely?

Yes. CVE-2026-31946 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31946?

CVE-2026-31946 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-31946

CWE-287Published: March 30, 2026· Updated: Apr 2, 2026

9.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.2th

Official Description

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 signatures. The JSONWebToken.parse() method silently discards the signature segment of the compact JWT (header.payload.signature), and the getAccessToken() methods in both OpenIdConnectApi and OpenIdConnectFullConfigurableApi only validate claim-level fields (issuer, audience, state, nonce) without any cryptographic signature verification against the Identity Provider's JWKS endpoint. This issue has been patched in version 20.2.5.

NVD Source

Technical Analysis

CVE-2026-31946 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.