chore(deps): update dependency @angular/compiler to v21.2.19 [security] - #397
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This PR contains the following updates:
21.2.15→21.2.19@angular/compiler: Two-Way Property Binding Sanitization Bypass (XSS)
CVE-2026-54265 / GHSA-58w9-8g37-x9v5
More information
Details
An issue in the
@angular/compilerpackage 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, orsandbox) is bound using the two-way binding syntax (e.g.,[(innerHTML)]="value"orbindon-innerHTML="value"), the Angular template compiler failed to apply the appropriate schema-derived sanitizer resolution to theTwoWayPropertyoperation. 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).
Impact
Any Angular application that uses two-way data binding (
[()]orbindon-) on security-sensitive native DOM properties (likeinnerHTML,hrefon<a>,srcon<img>/<iframe>, etc.) is vulnerable to this security bypass.Once exploited, this allows a malicious actor to supply an unsanitized property binding value that bypasses core sanitization constraints. This could lead to the execution of arbitrary JavaScript within the target user's browser context, potentially resulting in session hijacking, sensitive data exposure, or unauthorized actions on behalf of the user.
Attack Preconditions
To successfully exploit this vulnerability, the following environment parameters and application states must concurrently exist:
<div [(innerHTML)]="userContent"></div>).DomSanitizer) before passing the value to the bound property.Patches
Severity
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Angular i18n: Cross-Site Scripting (XSS) via event-handler attributes
CVE-2026-69151 / GHSA-jj27-h5hq-8x99
More information
Details
A Cross-Site Scripting (XSS) vulnerability has been identified in the Angular compiler's internationalization (i18n) pipeline. Although Angular disallows binding to event-handler attributes such as
onclickandonerrorthrough standard attribute validation (validateAttribute()/validateProperty()), the i18n metadata collection path allowed these same attribute names to be marked for translation usingi18n-on*attributes (e.g.,i18n-onerror).When exploited, a lower-trust translation file could replace a benign static handler such as
onerror="void 0"with arbitrary executable JavaScript in the localized build.The following example illustrates a vulnerable pattern:
Impact
When exploited, this vulnerability allows arbitrary JavaScript execution within the context of the vulnerable application's domain if an attacker can control or influence the translation files used during localization. This can lead to:
Patched Versions
Workarounds
Ensure that static event-handler attributes (e.g.,
onerror,onclick) are never marked for internationalization (i18n-on*) in application templates, and ensure translation files are sourced from trusted origins.Severity
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
angular/angular (@angular/compiler)
v21.2.19Compare Source
compiler
http
platform-server
v21.2.18Compare Source
compiler-cli
core
http
service-worker
v21.2.17Compare Source
Deprecations
platform-server
@angular/platform-serveris deprecated. Use standardfetchAPIs instead.common
compiler
core
http
platform-server
service-worker
v21.2.16Compare Source
common
compiler
core
platform-server
Configuration
📅 Schedule: (UTC)
🚦 Automerge: Enabled.
♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
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