CVE-2026-101895Angular SSR: Denial of Service (DoS) via Infinite Loop on Malformed DOCTYPE
- 8.7HighCVSS base score
- 0.87%Exploitation in 30 daysEPSS · top 41% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
- https://github.com/angular/angular/security/advisories/GHSA-f67j-2jqw-jpq7 (opens in a new tab)x_refsource_CONFIRMexploit
Timeline
ID reserved
By GitHub_M
- 16 days later
· 16 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 4.0 | High8.7 | 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 |
| NVDNVD · Awaiting Analysis | 4.0 | High8.7 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.87% · top 41% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Affected products
- affected <= 19.2.25
- affected >= 20.0.0, < 20.3.31
- affected >= 21.0.0, < 21.2.23
- affected >= 22.0.0, < 22.1.6
- affected <= 19.2.25
- affected >= 20.0.0, < 20.3.31
- affected >= 21.0.0, < 21.2.23
- affected >= 22.0.0, < 22.1.6
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@angular/platform-serverGHSA-f67j-2jqw-jpq7 (opens in a new tab)
References
References7
- https://github.com/angular/angular/security/advisories/GHSA-f67j-2jqw-jpq7 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/angular/angular/commit/3db26e2544964d07a520836ad01f02f36ec88e25 (opens in a new tab)x_refsource_MISC
- https://github.com/angular/angular/commit/fc2e8fbc0bda2f5c11585e8a0cbd88c074f5e567 (opens in a new tab)x_refsource_MISC
- https://github.com/angular/domino/commit/4d97473116d000e3fd4d6f75ec98cbd67576fa6f (opens in a new tab)x_refsource_MISC
- https://github.com/angular/angular/releases/tag/v20.3.31 (opens in a new tab)x_refsource_MISC
- https://github.com/angular/angular/releases/tag/v21.2.23 (opens in a new tab)x_refsource_MISC
- https://github.com/angular/angular/releases/tag/v22.1.6 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-101126 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-f67j-2jqw-jpq7 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-101895)Record last updated .