8.6

CVE-2026-88058: angular Cross-site Scripting

CVSS: 8.6v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-88058DEBIAN-CVE-2026-88058GHSA-j3r3-mxqp-r2p4
Published 10-09-2026Last modified 11-09-2026
Open JSON

Vulnerability summary

CVE-2026-88058 is a high (CVSS 8.6) Cross-site Scripting vulnerability in angular. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
44/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v4.0 (CVE.org)
EPSS score
0.28%
0%100%
Low · -0.22 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 10-09-2026
    PublishedVulnerability first disclosed.
  2. 11-09-2026
    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 20.3.30, 21.2.22, and 22.1.4, Angular server-side rendering (SSR) in @angular/platform-server serializes ProcessingInstruction DOM nodes inside fallback raw-content elements without escaping matching ancestor closing tags. ProcessingInstruction data escaped greater-than characters but left less-than characters untouched and did not inspect fallback ancestors, so data such as a matching closing tag prematurely terminates noscript, iframe, noembed, or noframes containers. The vulnerable nodes cannot be authored through standard Angular templates; reachability requires application or library code using inject(DOCUMENT).createProcessingInstruction with attacker-controlled data or Renderer2 DOM insertion inside a fallback container. In HTML5 RAWTEXT parsing, the premature close causes subsequent sibling elements to be interpreted as live HTML and enables arbitrary JavaScript execution in a victim's browser. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

-0.22 pp

From 0.50% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Angular

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

@angular1 product
  • platform-server≥ 22.0.0, < 22.1.4 | ≥ 21.0.0, < 21.2.22 | ≥ 20.0.0, < 20.3.30 | ≤ 19.2.25
Angular1 product
  • angular≤ 19.2.25 | ≥ 19.0.0, ≤ 19.2.25 | ≥ 20.0.0, < 20.3.30 | ≥ 21.0.0, < 21.2.22 | ≥ 22.0.0, < 22.1.4
Debian1 product
  • angular.jsAll versions (No fix recorded)
Ubuntu1 product
  • angular.jsAll versions (No fix recorded)

4 vendors · 4 products

References

14 links
Show all 14 references