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CVE-2026-54369

acl < 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions

CVSS 4.0 8.4 HIGHCVSS 3.1 7.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-54369

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-54369

Published

acl

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "defaultStatus": "affected",
                    "vendor": "acl project",
                    "product": "acl",
                    "repo": "https://savannah.nongnu.org/projects/acl/",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "versionType": "semver",
                            "lessThan": "2.4.0"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON