Detections
Analytics

Echo: libxml2-2.9.1: security update to 2.9.1+e1

high Tenable Self-Hosted Container Security Plugin ID 476497

Description

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

 - There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to
 be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact
 from this flaw is to confidentiality, integrity, and availability. (CVE-2021-3518)

Solution

Update the libxml2-2.9.1 library and its related packages to version 2.9.1+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2021-3518

Plugin Details

Severity: High

ID: 476497

Version: Revision 1.1

Type: Local

Published: 10/21/2026

Updated: 10/21/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.82

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2021-3518

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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: 10/21/2026

Vulnerability Publication Date: 5/18/2021

Reference Information

CVE: CVE-2021-3518