CVE-2026-61898

EUVD-2026-63380

20.08.2026, 15:17

The Ubuntu-specific language helper scripts (save-to-pam-env, update-langlist) shipped with accountsservice before 23.13.9-8ubuntu7 treat the user-controlled LANGUAGE entry in ~/.pam_environment as trusted input. The value is interpolated unescaped into a GNU sed replacement expression, allowing an attacker to inject a sed 'e' flag and arbitrary shell commands that execute with the privileges of the AccountsService helper process (real UID 0) via the SetLanguage D-Bus method.

OS Command Injection

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Debian Releases

Debian Product

Codename

accountsservice

bookworm	22.08.8-6 fixed
bullseye	0.6.55-3 fixed
forky	23.13.9-8 fixed
sid	23.13.9-8 fixed
trixie	23.13.9-7 fixed

Ubuntu Releases

Ubuntu Product

Codename

accountsservice

bionic	Fixed 0.6.45-1ubuntu1.3+esm2 released
focal	Fixed 0.6.55-0ubuntu12~20.04.7+esm1 released
jammy	Fixed 22.07.5-2ubuntu1.6 released
noble	Fixed 23.13.9-2ubuntu6.1 released
resolute	Fixed 23.13.9-8ubuntu5.2 released
trusty	Fixed 0.6.35-0ubuntu7.3+esm4 released
xenial	Fixed 0.6.40-2ubuntu11.6+esm2 released

Common Weakness Enumeration

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

References

https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/2157985

https://ubuntu.com/security/CVE-2026-61898