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TI-2026-60078 Aliases CVE-2026-88058GHSA-j3r3-mxqp-r2p4

Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements

Priority HIGH 72CWE-116Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00281 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed angular (angular): 20.3.30, 21.2.22, 22.1.4@angular/platform-server (npm): 22.1.4, 21.2.22, 20.3.30

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
angularangularup to 19.2.25; 20.0.0 to before 20.3.30; 21.0.0 to before 21.2.22; 22.0.0 to before 22.1.420.3.30, 21.2.22, 22.1.4Patch availableCNA
—@angular/platform-server (npm)22.0.0 to before 22.1.422.1.4Patch availableGHSA-j3r3-mxqp-r2p4
—@angular/platform-server (npm)21.0.0 to before 21.2.2221.2.22Patch availableGHSA-j3r3-mxqp-r2p4
—@angular/platform-server (npm)20.0.0 to before 20.3.3020.3.30Patch availableGHSA-j3r3-mxqp-r2p4
—@angular/platform-server (npm)up to 19.2.25—No fix listedGHSA-j3r3-mxqp-r2p4
  • angular Vendorangular Affected up to 19.2.25; 20.0.0 to before 20.3.30; 21.0.0 to before 21.2.22; 22.0.0 to before 22.1.4 Fixed in 20.3.30, 21.2.22, 22.1.4 Patch available CNA
  • @angular/platform-server (npm) Vendor— Affected 22.0.0 to before 22.1.4 Fixed in 22.1.4 Patch available GHSA-j3r3-mxqp-r2p4
  • @angular/platform-server (npm) Vendor— Affected 21.0.0 to before 21.2.22 Fixed in 21.2.22 Patch available GHSA-j3r3-mxqp-r2p4
  • @angular/platform-server (npm) Vendor— Affected 20.0.0 to before 20.3.30 Fixed in 20.3.30 Patch available GHSA-j3r3-mxqp-r2p4
  • @angular/platform-server (npm) Vendor— Affected up to 19.2.25 Fixed in — No fix listed GHSA-j3r3-mxqp-r2p4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*19.0.0 – 19.2.25; 20.0.0 to before 20.3.30; 21.0.0 to before 21.2.22; 22.0.0 to before 22.1.4Vulnerableangular
  • cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* Versions 19.0.0 – 19.2.25; 20.0.0 to before 20.3.30; 21.0.0 to before 21.2.22; 22.0.0 to before 22.1.4 Vulnerable ·angular

Remediation

  • Fix · CNA angular (angular) Fixed in 20.3.30, 21.2.22, 22.1.4
  • Fix · GHSA-j3r3-mxqp-r2p4 @angular/platform-server (npm) Fixed in 22.1.4 Advisory →
  • Fix · GHSA-j3r3-mxqp-r2p4 @angular/platform-server (npm) Fixed in 21.2.22 Advisory →
  • Fix · GHSA-j3r3-mxqp-r2p4 @angular/platform-server (npm) Fixed in 20.3.30 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-88058
  2. 2026-10-03 Alias added: GHSA-j3r3-mxqp-r2p4

References

Exploit 1

Patch 5

Advisory 1

Other 4

  • TI-2026-60076 Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR CVSS 4.0HIGH 8.6
  • TI-2026-60080 Angular: SSR XSS via Unescaped <template> Content Across DocumentFragment Boundaries in Fallback Raw-Content Elements CVSS 4.0HIGH 8.6
  • TI-2025-37971 A reflected cross-site scripting (XSS) vulnerability in CKeditor v46.1.0 & Angular… CVSS 3.1MEDIUM 5.4
  • TI-2026-36931 Angular: URL Parser Differential in @angular/platform-server leading to SSRF Allowlist Bypass CVSS 4.0HIGH 8.8
  • TI-2026-34131 Angular: SSRF via Hostname Hijacking in @angular/platform-server CVSS 4.0HIGH 8.8
  • TI-2026-48469 Angular: Cache-Key Ambiguity in HttpTransferCache Leading to Cross-Request Response Reuse and State Poisoning CVSS 4.0HIGH 8.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences