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TI-2026-30022 Aliases CVE-2026-41423GHSA-45q2-gjvg-7973

Angular: SSRF via protocol-relative and backslash URLs in Angular Platform-Server

Priority MEDIUM 43CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 9 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-918 and the CVSS impact.

Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.21, 20.3.19, 21.2.9, and 22.0.0-next.8, a Server-Side Request Forgery (SSRF) vulnerability exists in @angular/platform-server due to improper handling of URLs during Server-Side Rendering (SSR). When an attacker sends a request such as GET /\evil.com/ HTTP/1.1 the server engine (Express, etc.) passes the URL string to Angular’s rendering functions. Because the URL parser normalizes the backslash to a forward slash for HTTP/HTTPS schemes, the internal state of the application is hijacked to believe the current origin is evil.com. This misinterpretation tricks the application into treating the attacker’s domain as the local origin. Consequently, any relative HttpClient requests or PlatformLocation.hostname references are redirected to the attacker controlled server, potentially exposing internal APIs or metadata services. This issue has been patched in versions 19.2.21, 20.3.19, 21.2.9, and 22.0.0-next.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00305 23rd percentileScored 2026-11-07
Fix Partial angular (angular): 19.2.21, 20.3.19, 21.2.9 +1@angular/platform-server (npm): 22.0.0-next.8, 21.2.9, 20.3.19 +1Red Hat: 9 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
angularangularbefore 19.2.21; 20.0.0-next.0 to before 20.3.19; 21.0.0-next.0 to before 21.2.9; 22.0.0-next.0 to before 22.0.0-next.819.2.21, 20.3.19, 21.2.9, 22.0.0-next.8Patch availableCNA
—@angular/platform-server (npm)22.0.0-next.0 to before 22.0.0-next.822.0.0-next.8Patch availableGHSA-45q2-gjvg-7973
—@angular/platform-server (npm)21.0.0-next.0 to before 21.2.921.2.9Patch availableGHSA-45q2-gjvg-7973
—@angular/platform-server (npm)20.0.0-next.0 to before 20.3.1920.3.19Patch availableGHSA-45q2-gjvg-7973
—@angular/platform-server (npm)19.0.0-next.0 to before 19.2.2119.2.21Patch availableGHSA-45q2-gjvg-7973
—@angular/platform-server (npm)up to 18.2.14—No fix listedGHSA-45q2-gjvg-7973
  • angular Vendorangular Affected before 19.2.21; 20.0.0-next.0 to before 20.3.19; 21.0.0-next.0 to before 21.2.9; 22.0.0-next.0 to before 22.0.0-next.8 Fixed in 19.2.21, 20.3.19, 21.2.9, 22.0.0-next.8 Patch available CNA
  • @angular/platform-server (npm) Vendor— Affected 22.0.0-next.0 to before 22.0.0-next.8 Fixed in 22.0.0-next.8 Patch available GHSA-45q2-gjvg-7973
  • @angular/platform-server (npm) Vendor— Affected 21.0.0-next.0 to before 21.2.9 Fixed in 21.2.9 Patch available GHSA-45q2-gjvg-7973
  • @angular/platform-server (npm) Vendor— Affected 20.0.0-next.0 to before 20.3.19 Fixed in 20.3.19 Patch available GHSA-45q2-gjvg-7973
  • @angular/platform-server (npm) Vendor— Affected 19.0.0-next.0 to before 19.2.21 Fixed in 19.2.21 Patch available GHSA-45q2-gjvg-7973
  • @angular/platform-server (npm) Vendor— Affected up to 18.2.14 Fixed in — No fix listed GHSA-45q2-gjvg-7973

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*before 19.2.21; 20.0.0 to before 20.3.19; 21.0.0 to before 21.2.9Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next0:*:*:*:node.js:*:*22.0.0 next0Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next1:*:*:*:node.js:*:*22.0.0 next1Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next2:*:*:*:node.js:*:*22.0.0 next2Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next3:*:*:*:node.js:*:*22.0.0 next3Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next4:*:*:*:node.js:*:*22.0.0 next4Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next5:*:*:*:node.js:*:*22.0.0 next5Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next6:*:*:*:node.js:*:*22.0.0 next6Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next7:*:*:*:node.js:*:*22.0.0 next7Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next8:*:*:*:node.js:*:*22.0.0 next8Vulnerableangular
  • cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* Versions before 19.2.21; 20.0.0 to before 20.3.19; 21.0.0 to before 21.2.9 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next0:*:*:*:node.js:*:* Versions 22.0.0 next0 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next1:*:*:*:node.js:*:* Versions 22.0.0 next1 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next2:*:*:*:node.js:*:* Versions 22.0.0 next2 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next3:*:*:*:node.js:*:* Versions 22.0.0 next3 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next4:*:*:*:node.js:*:* Versions 22.0.0 next4 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next5:*:*:*:node.js:*:* Versions 22.0.0 next5 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next6:*:*:*:node.js:*:* Versions 22.0.0 next6 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next7:*:*:*:node.js:*:* Versions 22.0.0 next7 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next8:*:*:*:node.js:*:* Versions 22.0.0 next8 Vulnerable ·angular

Remediation

  • Fix · CNA angular (angular) Fixed in 19.2.21, 20.3.19, 21.2.9, 22.0.0-next.8
  • Fix · GHSA-45q2-gjvg-7973 @angular/platform-server (npm) Fixed in 22.0.0-next.8 Advisory →
  • Fix · GHSA-45q2-gjvg-7973 @angular/platform-server (npm) Fixed in 21.2.9 Advisory →
  • Fix · GHSA-45q2-gjvg-7973 @angular/platform-server (npm) Fixed in 20.3.19 Advisory →
  • Fix · GHSA-45q2-gjvg-7973 @angular/platform-server (npm) Fixed in 19.2.21 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat AMQ Broker 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 10AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7Affected—
Red Hat Enterprise Linux 8Affected—
Red Hat Enterprise Linux 9AffectedNo fix planned: Out of support scope
Red Hat Fuse 7AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Application Platform Expansion PackAffectedNo fix yet: Fix deferred
Red Hat OpenStack Platform 16.2AffectedNo fix yet
Red Hat Single Sign-On 7AffectedNo fix yet: Fix deferred
Not affected: 1 product
  • Red Hat Quay 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41423
  2. 2026-10-03 Alias added: GHSA-45q2-gjvg-7973
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Patch 1

Advisory 2

Other 2

  • 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-2026-60078 Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes 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
See all 28 →

Sources

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