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Echo: dompurify: security update to 3.4.11

medium Tenable Self-Hosted Container Security Plugin ID 463069

Description

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

 - DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an
 uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can
 register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then
 submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.
 (CVE-2026-65898)

Solution

Update the dompurify library and its related packages to version 3.4.11 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-65898

Plugin Details

Severity: Medium

ID: 463069

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.76

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2026-65898

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: Medium

Base Score: 5.1

Threat Score: 2

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 6/18/2026

Reference Information

CVE: CVE-2026-65898