High 7.1Published Jun 29, 2026

CVE-2026-54369acl < 2.4.0 Symlink Traversal Privilege Escalation via libacl Functions

Updated under an hour ago (Oct 27, 2026, 6:40 PM ET)

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It affects acl project acl and 8 other products. Add what you run to find out whether that includes you.

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Every CVE for acl project acl

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-59
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

acl project acl acl_project:acl (from the name)	before 2.4.0	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:2.4.0-1.el10_2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:2.4.0-0.el10_0.1 not affected	CISA ADP
Red Hat Red Hat OpenShift Container Platform 4.22 redhat:openshift	from 4.22.9.8.202608130832-0 not affected	CISA ADP
Red Hat Red Hat Discovery 2 redhat:discovery	from 1784821670 not affected	CISA ADP
Red Hat Red Hat Hardened Images redhat:hummingbird	from 2.4.0-0.1.hum1 not affected	CISA ADP
Red Hat Red Hat Insights proxy 1.5 redhat:insights_proxy	from 1786433656 not affected	CISA ADP
Red Hat Red Hat OpenShift distributed tracing 3.10.2 redhat:openshift_distributed_tracing	from 1785704636 not affected	CISA ADP
Red Hat Red Hat Update Infrastructure 5 redhat:rhui	from 1784794818 not affected	CISA ADP

References

References

https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=3589787cd589b34bdd9265936e17190b6d3f17d1	patch
https://cgit.git.savannah.nongnu.org/cgit/acl.git/commit/?id=24a227d0ab8576612194f8a56c2314389adc74a5	issue-tracking
https://www.vulncheck.com/advisories/acl-symlink-traversal-privilege-escalation-via-libacl-functions	third-party-advisory
https://access.redhat.com/errata/RHSA-2026:34351
https://access.redhat.com/errata/RHSA-2026:42736
https://access.redhat.com/errata/RHSA-2026:42739
https://access.redhat.com/errata/RHSA-2026:43420
https://access.redhat.com/errata/RHSA-2026:44481
https://access.redhat.com/errata/RHSA-2026:46836
https://access.redhat.com/errata/RHSA-2026:50205
1–10 of 20

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.