SCA: security update for AngleSharp (GHSA-pgww-w46g-26qg)

medium Tenable Cloud Security Plugin ID 444844

Description

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

- AngleSharp is a .NET library for parsing angle bracket based hyper-texts. Prior to 1.5.0,
MathAnnotationXmlElement in AngleSharp/Mathml/Dom/Internal/MathAnnotationXmlElement.cs is not treated as
an HTML integration point when its encoding attribute is text/html or application/xhtml+xml, causing
Consume in AngleSharp/Html/Parser/HtmlDomBuilder.cs to route tokens through foreign-content parsing
instead of HTML parsing. A sanitizer can therefore observe a different DOM from the browser that reparses
the serialized output. An attacker can combine this namespace differential with markup-breaking characters
in an attribute value so that an element hidden from the sanitizer becomes active script-capable HTML
after browser reparse, resulting in mutation cross-site scripting. This issue is fixed in version 1.5.0.
(CVE-2026-54570)

Solution

Update the AngleSharp library and its related packages to version 1.5.0 or later.

Plugin Details

Severity: Medium

ID: 444844

Version: Revision 1.3

Type: Local

Family: SCA Checks

Published: 7/18/2026

Updated: 8/19/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.81

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2026-54570

CVSS v3

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 6

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/17/2026

Vulnerability Publication Date: 7/17/2026

Reference Information

CVE: CVE-2026-54570

cwe: CWE-80

Detections

Analytics