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TI-2026-37277 Aliases CVE-2026-50555GHSA-hqr9-c56f-3x7f

Cross-site scripting in angular

Priority LOW 39CWE-79Published · 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 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 raw-text elements (such as <script>, <style>, and <iframe>). domino supports escaping raw-text elements during serialization to prevent closing-tag breakout. However, a Unicode index alignment bug existed in this escaping logic. In JavaScript, string lengths and character indices are calculated based on UTF-16 code units (where astral characters—such as emojis—occupy 2 code units / 4 bytes). If the bound dynamic text contained astral Unicode characters before the closing tag (e.g. </script>, </style>, or </iframe>), the index offset calculation in domino's replacement logic shifted. This misalignment caused domino to fail to replace or escape the closing tag, leaving it raw and unescaped in the output HTML. An attacker who controls the dynamic text can supply a payload containing both an astral Unicode character and a closing tag (e.g., 😀</iframe><script>alert(1)</script>). When serialized on the server during SSR, the browser parses the unescaped closing tag, exits the raw-text context early, and executes the subsequent <script> block, leading to 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00267 18th percentileScored 2026-11-07
Fix Fixed angular (angular): 22.0.0-rc.2, 21.2.16, 20.3.24 +1@angular/platform-server (npm): 22.0.0-rc.2, 21.2.16, 20.3.24 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
angularangular22.0.0-next.0 to before 22.0.0-rc.2; 21.0.0-next.0 to before 21.2.16; 20.0.0-next.0 to before 20.3.24; 19.0.0-next.0 to before 19.2.25; up to 18.2.1422.0.0-rc.2, 21.2.16, 20.3.24, 19.2.25Patch availableCNA
—@angular/platform-server (npm)22.0.0-next.0 to before 22.0.0-rc.222.0.0-rc.2Patch availableGHSA-hqr9-c56f-3x7f
—@angular/platform-server (npm)21.0.0-next.0 to before 21.2.1621.2.16Patch availableGHSA-hqr9-c56f-3x7f
—@angular/platform-server (npm)20.0.0-next.0 to before 20.3.2420.3.24Patch availableGHSA-hqr9-c56f-3x7f
—@angular/platform-server (npm)19.0.0-next.0 to before 19.2.2519.2.25Patch availableGHSA-hqr9-c56f-3x7f
—@angular/platform-server (npm)up to 18.2.14—No fix listedGHSA-hqr9-c56f-3x7f
  • angular Vendorangular Affected 22.0.0-next.0 to before 22.0.0-rc.2; 21.0.0-next.0 to before 21.2.16; 20.0.0-next.0 to before 20.3.24; 19.0.0-next.0 to before 19.2.25; up to 18.2.14 Fixed in 22.0.0-rc.2, 21.2.16, 20.3.24, 19.2.25 Patch available CNA
  • @angular/platform-server (npm) Vendor— Affected 22.0.0-next.0 to before 22.0.0-rc.2 Fixed in 22.0.0-rc.2 Patch available GHSA-hqr9-c56f-3x7f
  • @angular/platform-server (npm) Vendor— Affected 21.0.0-next.0 to before 21.2.16 Fixed in 21.2.16 Patch available GHSA-hqr9-c56f-3x7f
  • @angular/platform-server (npm) Vendor— Affected 20.0.0-next.0 to before 20.3.24 Fixed in 20.3.24 Patch available GHSA-hqr9-c56f-3x7f
  • @angular/platform-server (npm) Vendor— Affected 19.0.0-next.0 to before 19.2.25 Fixed in 19.2.25 Patch available GHSA-hqr9-c56f-3x7f
  • @angular/platform-server (npm) Vendor— Affected up to 18.2.14 Fixed in — No fix listed GHSA-hqr9-c56f-3x7f

CPE configurations NVD · 16

CPEVersionsRoleVendor
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*up to 18.2.14; 19.0.0 to before 19.2.25; 20.0.0 to before 20.3.24; 21.0.0 to before 21.2.6Vulnerableangular
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:next10:*:*:*:node.js:*:*22.0.0 next10Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next11:*:*:*:node.js:*:*22.0.0 next11Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:next12:*:*:*:node.js:*:*22.0.0 next12Vulnerableangular
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:*:*:*:*:*:node.js:*:* Versions up to 18.2.14; 19.0.0 to before 19.2.25; 20.0.0 to before 20.3.24; 21.0.0 to before 21.2.6 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:next10:*:*:*:node.js:*:* Versions 22.0.0 next10 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next11:*:*:*:node.js:*:* Versions 22.0.0 next11 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:next12:*:*:*:node.js:*:* Versions 22.0.0 next12 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
Show 6 more CPE
CPEVersionsRoleVendor
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:22.0.0:next9:*:*:*:node.js:*:*22.0.0 next9Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:rc0:*:*:*:node.js:*:*22.0.0 rc0Vulnerableangular
cpe:2.3:a:angular:angular:22.0.0:rc1:*:*:*:node.js:*:*22.0.0 rc1Vulnerableangular
  • 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
  • cpe:2.3:a:angular:angular:22.0.0:next9:*:*:*:node.js:*:* Versions 22.0.0 next9 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:rc0:*:*:*:node.js:*:* Versions 22.0.0 rc0 Vulnerable ·angular
  • cpe:2.3:a:angular:angular:22.0.0:rc1:*:*:*:node.js:*:* Versions 22.0.0 rc1 Vulnerable ·angular

Remediation

  • Fix · CNA angular (angular) Fixed in 22.0.0-rc.2, 21.2.16, 20.3.24, 19.2.25
  • Fix · GHSA-hqr9-c56f-3x7f @angular/platform-server (npm) Fixed in 22.0.0-rc.2 Advisory →
  • Fix · GHSA-hqr9-c56f-3x7f @angular/platform-server (npm) Fixed in 21.2.16 Advisory →
  • Fix · GHSA-hqr9-c56f-3x7f @angular/platform-server (npm) Fixed in 20.3.24 Advisory →
  • Fix · GHSA-hqr9-c56f-3x7f @angular/platform-server (npm) Fixed in 19.2.25 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-50555
  2. 2026-10-03 Alias added: GHSA-hqr9-c56f-3x7f

References

Patch 1

Advisory 2

Other 1

  • 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