Detections
Analytics
Ubuntu 26.10 : authd vulnerability (USN-8957-1)
medium Nessus Plugin ID 372909
Synopsis
The remote Ubuntu host is missing a security update.Description
The remote Ubuntu 26.10 host has a package installed that is affected by a vulnerability as referenced in the USN-8957-1 advisory.Ali Mashally discovered that authd did not properly validate user identities when matching accounts from identity providers. An attacker could possibly use this issue to gain access to another user's local account and files, resulting in unauthorized access to sensitive information.
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected authd package.See Also
Plugin Details
Severity: Medium
ID: 372909
File Name: ubuntu_USN-8957-1.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Ubuntu Local Security Checks
Published: 10/28/2026
Updated: 10/28/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.47
CVSS v2
Risk Factor: Low
Base Score: 3.6
Temporal Score: 2.7
Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2026-102631
CVSS v3
Risk Factor: High
Base Score: 7.1
Temporal Score: 6.2
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 5.9
Threat Score: 2.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/o:canonical:ubuntu_linux:26.10, p-cpe:/a:canonical:ubuntu_linux:authd
Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release
Exploit Ease: No known exploits are available
Patch Publication Date: 10/27/2026
Vulnerability Publication Date: 10/15/2026
Reference Information
CVE: CVE-2026-102631
USN: 8957-1