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SCA: security update for authlib (GHSA-fch4-3c6x-j4gc)

medium Tenable Cloud Security Plugin ID 477599

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-114618)

Solution

Update the authlib library and its related packages to version 1.9.0 or later.

See Also

https://github.com/advisories/GHSA-fch4-3c6x-j4gc

Plugin Details

Severity: Medium

ID: 477599

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/27/2026

Updated: 10/27/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.58

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 4.9

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-114618

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/27/2026

Vulnerability Publication Date: 10/22/2026

Reference Information

CVE: CVE-2026-114618