CVE-2026-101895
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.31, 21.2.23, and 22.1.6, the @angular/platform-server DOM emulation parser can enter an infinite synchronous loop when Angular server-side rendering processes attacker-controlled HTML containing an incomplete DOCTYPE that ends with whitespace at end of input. In Domino lib/HTMLParser.js, after_doctype_name_state emits doctype and EOF tokens without advancing nextchar or leaving the fixed-lookahead state, so the scanner repeatedly handles the same EOF marker. A remote unauthenticated attacker can use this condition through server-side HTML parsing paths such as innerHTML binding to consume a Node.js SSR worker at full CPU, starve the event loop, and stop concurrent and subsequent requests. This issue is fixed in versions 20.3.31, 21.2.23, and 22.1.6.
- CVSS 4.0
- 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-400, CWE-835
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-f67j-2jqw-jpq7 | npm | @angular/platform-server | >=22.0.0 <22.1.6 | 22.1.6 |
| GHSA-f67j-2jqw-jpq7 | npm | @angular/platform-server | >=21.0.0 <21.2.23 | 21.2.23 |
| GHSA-f67j-2jqw-jpq7 | npm | @angular/platform-server | >=20.0.0 <20.3.31 | 20.3.31 |
| GHSA-f67j-2jqw-jpq7 | npm | @angular/platform-server | <=19.2.25 | no fix published |
References
- https://github.com/angular/angular/commit/3db26e2544964d07a520836ad01f02f36ec88e25
- https://github.com/angular/angular/commit/fc2e8fbc0bda2f5c11585e8a0cbd88c074f5e567
- https://github.com/angular/angular/releases/tag/v20.3.31
- https://github.com/angular/angular/releases/tag/v21.2.23
- https://github.com/angular/angular/releases/tag/v22.1.6