Bug 2491416 (CVE-2026-54265)

Summary: CVE-2026-54265 @angular/compiler: Angular: Two-Way Property Binding Sanitization Bypass (XSS)
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anujha, aschwart, asoldano, aszczucz, bbaranow, bdettelb, bmaxwell, boliveir, bstansbe, dlofthou, doconnor, drichtar, eglynn, ewittman, gotiwari, gparvin, istudens, ivassile, iweiss, janstey, jhorak, jjoyce, jpretori, jschluet, lchilton, lhh, mburns, mgarciac, mosmerov, mposolda, msvehla, mvyas, nipatil, nwallace, pantinor, pberan, pesilva, pjindal, pmackay, rhaigner, rhel-process-autobot, rkubis, rmartinc, rstancel, sfeifer, ssilvert, sthorger, teagle, thjenkin, vdosoudi, vmuzikar, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Angular's @angular/compiler package. When a native DOM property requiring sanitization is bound using two-way binding syntax, the template compiler fails to apply the appropriate sanitizer. An attacker who controls the bound value can bypass Angular's built-in sanitization, potentially leading to cross-site scripting (XSS).
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Description OSIDB Bzimport 2026-06-22 16:02:24 UTC 
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.1, 21.2.17, and 20.3.25, an issue in the @angular/compiler package allows bypassing DOM property sanitization through the use of two-way property bindings. Specifically, when a native DOM property that requires sanitization (such as innerHTML, srcdoc, src, href, data, or sandbox) is bound using the two-way binding syntax (e.g., [(innerHTML)]="value" or bindon-innerHTML="value"), the Angular template compiler failed to apply the appropriate schema-derived sanitizer resolution to the TwoWayProperty operation. As a result, native two-way DOM bindings were emitted without the required sanitizer function, whereas equivalent one-way bindings would be properly sanitized. This flaw enables an attacker who can control the value of a two-way bound sensitive property to bypass Angular's built-in sanitization logic, potentially leading to client-side Cross-Site Scripting (XSS). This vulnerability is fixed in 22.0.1, 21.2.17, and 20.3.25.