# CVE-2026-54369

## Summary

- **CVE ID:** CVE-2026-54369
- **Severity:** HIGH
- **CVSS Score:** 8.4 (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)
- **CWE:** CWE-59
- **Published:** Jun 29, 2026
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- acl project — acl (0)

## References

- [CNA](https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=3589787cd589b34bdd9265936e17190b6d3f17d1)
- [CNA](https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=24a227d0ab8576612194f8a56c2314389adc74a5)
- [CNA](https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functions)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-54369)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2490277)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54369.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:34351)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:42739)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:42736)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:43420)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:44481)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:46836)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:50205)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:53371)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:54769)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:58981)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:64805)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:67142)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:67144)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:67140)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._