CVE-2026-54369 | acl before version 2.4.0 contains a symlink traversal vulner… | CVSS 7.1 HIGH

Description

acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions acl_get_file(), acl_set_file(), acl_extended_file(), and acl_delete_def_file() that allows local attackers to escalate privileges by replacing any pathname component with a symbolic link. Attackers who control any component of a pathname processed by a privileged caller can redirect ACL read or write operations to arbitrary files or directories, enabling unauthorized manipulation of access control lists and local privilege escalation.

Metadata

CVE ID: CVE-2026-54369
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-12 20:20 UTC
Published: 2026-06-29 12:37 UTC
Last updated: 2026-06-29 13:58 UTC
Primary CWE: CWE-59
Improper Link Resolution Before File Access ('Link Following…
Vendor / Product: acl project / acl
Sources: cve.org · NVD

Severity & Metrics

7.1 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
acl project	acl	—	0 < 2.4.0

Weakness (CWE)

CWE	Source	Description
CWE-59	cna	Improper Link Resolution Before File Access ('Link Following')

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.4	HIGH	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
7.1	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References (3)