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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 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,
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:969a09ad414c8205fe66eee1eea20f9db473745b165533a98af652cb7d64257d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"OpenOLAT","vendor":"OpenOLAT","versions":[{"status":"affected","version":">= 10.5.4, < 20.2.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-v8vp-x4q4-2vch","tags":["x_refsource_CONFIRM"],"url":"https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-v8vp-x4q4-2vch"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4598ae8737fe391113356eb4153c90037b6506026d997a8a001ac2ae1f41fb10 · sha256:e692399a0f84f1d8… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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