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CVE-2026-114618

6.8 medium Published
NVD · CVE.org

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, the default RFC 7523 JWTBearerGrant.get_audiences() returns an empty list, causing JWTBearerGrant.verify_claims() to require only that an aud claim exists without matching the current authorization server. An attacker holding a legitimate assertion for another service can present it to a server that shares the signing key and uses the default grant, obtaining an access token across a trust boundary. Implementations that override get_audiences() with the server's valid audience identifiers are not affected. This issue is fixed in version 1.9.0.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 4

  1. StatusAwaiting Analysis → PublishedNVD modified 2026-10-29 12:29
  2. StatusPublished → Awaiting AnalysisNVD modified 2026-10-23 19:34
  3. StatusReceived → PublishedNVD modified 2026-10-22 21:28
  4. First seenCVSS 6.8NVD modified 2026-10-22 22:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 4