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Echo: dompurify: security update to 3.4.9

medium Tenable Self-Hosted Container Security Plugin ID 460792

Description

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

 - DOMPurify 3.0.0 before 3.4.9 does not reset the retained Trusted Types policy when clearConfig() is
 called, so a DOMPurify instance reused across trust boundaries stays bound to a previously supplied
 TRUSTED_TYPES_POLICY. A later caller that requests RETURN_TRUSTED_TYPE output receives a TrustedHTML
 object created by the old (potentially unsafe) policy rather than a clean default, which can lead to
 script execution at a Trusted Types sink. Passing TRUSTED_TYPES_POLICY: null on the later call also does
 not clear the retained policy. (CVE-2026-65899)

Solution

Update the dompurify library and its related packages to version 3.4.9 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-65899

Plugin Details

Severity: Medium

ID: 460792

Version: Revision 1.1

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: 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-2026-65899

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:N/UI:A/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: 6/15/2026

Reference Information

CVE: CVE-2026-65899