High 8.6Published Jun 22, 2026

CVE-2026-50556Angular: Missing `<noscript>` Raw-Text Serialization Escaping leads to Cross-Site Scripting (XSS) in Angular SSR

Updated under an hour ago (Oct 27, 2026, 11:30 AM ET)

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Exploited in the last 30 days

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.

CVSS: 8.6 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

angular angular angular:angular (from the name)	from 22.0.0-next.0, < 22.0.0-rc.2; from 21.0.0-next.0, < 21.2.16; from 20.0.0-next.0, < 20.3.24; from 19.0.0-next.0, < 19.2.25; through 18.2.14	CNA record
Red Hat Red Hat Enterprise Linux 8 redhat:enterprise_linux	8	CISA ADP
Red Hat Red Hat Fuse 7 redhat:jboss_fuse	7	CISA ADP
angular angular angular:angular	through 18.2.14; from 19.0.0 before 19.2.25; from 20.0.0 before 20.3.24; from 21.0.0 before 21.2.16; 22.0.0; 22.0.0; 22.0.0; 22.0.0; and 11 more ranges	NVD

References

References

https://github.com/angular/angular/security/advisories/GHSA-gxx4-3xcv-f8qx	x-refsource-confirm, third-party-advisory
https://github.com/angular/angular/issues/68903	x-refsource-misc, issue-tracking
https://github.com/angular/domino/pull/29	x-refsource-misc, issue-tracking, patch
https://access.redhat.com/security/cve/CVE-2026-50556	third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2491459	third-party-advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50556.json	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.