Detections
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Echo: expat: security update to 2.8.2-1

medium Tenable Self-Hosted Container Security Plugin ID 457194

Description

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

 - libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call
 depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-
 free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219. (CVE-2026-56412)

Solution

Update the expat library and its related packages to version 2.8.2-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-56412

Plugin Details

Severity: Medium

ID: 457194

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.8

Percentile: 22.2

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-56412

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2026

Vulnerability Publication Date: 6/21/2026

Reference Information

CVE: CVE-2026-56412

IAVA: 2026-A-0650-S