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SCA: security update for @angular/platform-server (GHSA-gxx4-3xcv-f8qx)

high Tenable Cloud Security Plugin ID 443197

Description

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

 - Angular is a development platform for building mobile and desktop web applications using
 TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.16, 20.3.24, and 19.2.25, a Cross-
 Site Scripting (XSS) vulnerability exists in @angular/platform-server's DOM emulation dependency (domino)
 when serializing the content of <noscript> elements. When rendering dynamic text content inside a
 <noscript> element via template bindings (such as {{ value }} or [textContent]), the template engine
 expects the browser to render the content safely. Under Server-Side Rendering (SSR), domino is configured
 with scripting enabled, meaning <noscript> is treated as a raw-text element. However, domino's serializer
 completely omitted <noscript> from the list of raw-text elements requiring closing-tag escaping during DOM
 serialization. As a result, any occurrence of </noscript> in the bound dynamic text was never escaped
 under any circumstances. The unescaped closing tag was serialized directly into the output HTML (e.g.
 <noscript></noscript><script>alert(1)</script></noscript>). When parsed by a browser, it closes the
 <noscript> block early, allowing the injected <script> block to execute in the user's browser context,
 causing same-origin Cross-Site Scripting (XSS). This vulnerability is fixed in 22.0.0-rc.2, 21.2.16,
 20.3.24, and 19.2.25. (CVE-2026-50556)

Solution

Update the @angular/platform-server library and its related packages to version 19.2.25 or later.

See Also

https://github.com/advisories/GHSA-gxx4-3xcv-f8qx

Plugin Details

Severity: High

ID: 443197

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 6/15/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.53

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-50556

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.6

Threat Score: 6.2

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/15/2026

Vulnerability Publication Date: 6/15/2026

Reference Information

CVE: CVE-2026-50556

cwe: CWE-79