XSS in Angular
CVE-2026-88057
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.28, 21.2.20, and 22.1.0, Angular's compiler and runtime in @angular/core and @angular/compiler could omit or select an incorrect sanitizer for security-sensitive directive host bindings because SecurityContext was derived from the declaring directive or component selector rather than the concrete host element. The mismatch is reachable through hostDirectives composition, inherited HostBinding declarations, createComponent with a custom hostElement or dynamic directives, SVG/MathML namespace elements, and tag-neutral selectors such as :not(...). Attacker-controlled href, src, action, xlink:href, or data values can therefore reach DOM attributes without Angular's built-in sanitizer and execute arbitrary JavaScript in the user's browser context. Applications unable to upgrade can use DomSanitizer.sanitize with SecurityContext.URL before assignment or restrict inputs to validated HTTP and HTTPS URL schemes. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.004 · change: -0.004
Affected products
- Angular — versions <= 19.2.25, >= 20.0.0, < 20.3.28, >= 21.0.0, < 21.2.20
Weakness classification (CWE)
References
- github.com/angular/angular/security/advisories/GHSA-hh8m-fm6v-7cvg (Exploit, Vendor Advisory)
- github.com/angular/angular/issues/69550 (Patch, Issue Tracking)
- github.com/angular/angular/pull/69558 (Patch, Issue Tracking)
- github.com/angular/angular/commit/2f96c8020f85ccb715a76de4b79a0c680c2c7264 (Patch)
- github.com/angular/angular/commit/6afe6fa781c2f0931f0aedd729b9884a8fe212ee (Patch)
- github.com/angular/angular/commit/6caa298dee58319b2d674dc91364e26ffe3ecb2b (Patch)
- github.com/angular/angular/releases/tag/v20.3.28 (Release Notes)
- github.com/angular/angular/releases/tag/v21.2.20 (Release Notes)
- github.com/angular/angular/releases/tag/v22.1.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-88057?
- CVE-2026-88057 is a medium-severity vulnerability in Angular, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-10.
- How severe is CVE-2026-88057?
- Medium severity. CVSS v3 base score is 6.1 out of 10.