CVE-2026-6970

HIGH EPSS 1.5%
Published Apr 27, 20262mo ago · Modified Jun 17, 20262w ago
7.3 CVSS 4.0
High
Find Similar
Published Apr 27, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.3
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
1.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-842

References 2

  • github.com https://github.com/canonical/authd/commit/154b428305cb1a7a19c897626fefd09d6dde8b9f
  • github.com https://github.com/canonical/authd/security/advisories/GHSA-fg3j-5w9g-hmg7

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.