Detections
Analytics

Echo: acl: security update to 2.4.0-1

high Tenable Cloud Security Plugin ID 458936

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability
 that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link
 between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(),
 acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access
 control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged
 process over an attacker-controlled path, resulting in local privilege escalation. (CVE-2026-54370)

Solution

Update the acl library and its related packages to version 2.4.0-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-54370

Plugin Details

Severity: High

ID: 458936

Version: Revision 1.2

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.5

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-54370

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.5

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 7.2

Threat Score: 4.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/30/2026

Vulnerability Publication Date: 6/29/2026

Reference Information

CVE: CVE-2026-54370