8.6

CVE-2026-50556: angular Cross-site Scripting

CVSS: 8.6v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-50556DEBIAN-CVE-2026-50556GHSA-gxx4-3xcv-f8qx
Published 22-06-2026Last modified 15-07-2026
Open JSON

Vulnerability summary

CVE-2026-50556 is a high (CVSS 8.6) Cross-site Scripting vulnerability in angular. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v4.0 (CVE.org)
EPSS score
0.41%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-06-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

8 scores · 5 sources · 2 versions

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

0.00 pp

From 0.41% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

@angular1 product
  • platform-server≥ 22.0.0-next.0, < 22.0.0-rc.2 | ≥ 21.0.0-next.0, < 21.2.16 | ≥ 20.0.0-next.0, < 20.3.24 | ≥ 19.0.0-next.0, < 19.2.25 | ≤ 18.2.14
Angular1 product
  • angular≥ 22.0.0-next.0, < 22.0.0-rc.2 | ≥ 21.0.0-next.0, < 21.2.16 | ≥ 20.0.0-next.0, < 20.3.24 | ≥ 19.0.0-next.0, < 19.2.25 | ≤ 18.2.14 | ≥ 19.0.0, < 19.2.25 | ≥ 20.0.0, < 20.3.24 | ≥ 21.0.0, < 21.2.16 | 22.0.0:next0 | 22.0.0:next1 | 22.0.0:next10 | 22.0.0:next11 | 22.0.0:next12 | 22.0.0:next2 | 22.0.0:next3 | 22.0.0:next4 | 22.0.0:next5 | 22.0.0:next6 | 22.0.0:next7 | 22.0.0:next8 | 22.0.0:next9 | 22.0.0:rc0 | 22.0.0:rc1
Debian1 product
  • angular.jsAll versions (No fix recorded)
Ubuntu1 product
  • angular.jsAll versions (No fix recorded)

4 vendors · 4 products

References

10 links