Detections
Analytics

Echo: expat: security update to 2.8.4-1

high Tenable Cloud Security Plugin ID 457487

Description

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

 - libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-
 free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.
 (CVE-2026-76957)

Solution

Update the expat library and its related packages to version 2.8.4-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-76957

Plugin Details

Severity: High

ID: 457487

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.35

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-76957

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/20/2026

Vulnerability Publication Date: 8/20/2026

Reference Information

CVE: CVE-2026-76957

IAVA: 2026-A-0925-S