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SCA: security update for github.com/canonical/authd (GHSA-fg3j-5w9g-hmg7)

high Tenable Cloud Security Plugin ID 441195

Description

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

 - authd prior to version 0.6.4 contains a logic error in primary group ID assignment that can lead to local
 privilege escalation. When a user's primary group ID (GID) differs from their UID, either because the
 account was created with authd prior to version 0.5.4 or because the primary group was manually changed
 via the `authctl group set-gid` command, and the user's identity provider record is updated, authd
 incorrectly resets the user's primary group ID to their UID upon next login. This causes newly created
 files and directories to be owned by the wrong group, causing denial of service issues, and potentially
 granting unintended access to other local users and allowing local privilege escalation. (CVE-2026-6970)

Solution

Update the github.com/canonical/authd library and its related packages to version 0.6.4 or later.

See Also

https://github.com/advisories/GHSA-fg3j-5w9g-hmg7

Plugin Details

Severity: High

ID: 441195

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 5/6/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.99

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-6970

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS v4

Risk Factor: High

Base Score: 7.3

Threat Score: 4.4

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/5/2026

Vulnerability Publication Date: 4/27/2026

Reference Information

CVE: CVE-2026-6970

cwe: CWE-842