python-authlib: Authlib is a Python library which builds OAuth and OpenID Connect servers
CVE-2026-114618 is fixed in python-authlib on 1 platform by DEBIAN-CVE-2026-114618 (version 1.9.1-1), released October 31, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-authlib · Debian 14 | 1.9.1-1 | DEBIAN-CVE-2026-114618 | Oct 31, 2026 |
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