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fix(compiler): disallow i18n event attributes #68821

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fix(compiler): disallow i18n event attributes #68821

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2 changes: 1 addition & 1 deletion packages/compiler/src/render3/view/i18n/meta.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -208,7 +208,7 @@ export class I18nMetaVisitor implements html.Visitor {
isTrustedType = isTrustedTypesSink(node.name, name);
}

if (isTrustedType) {
if (isTrustedType || name.toLowerCase().startsWith('on')) {
this._reportError(
attr,
`Translating attribute '${name}' is disallowed for security reasons.`,
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9 changes: 9 additions & 0 deletions packages/core/test/linker/security_integration_spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -348,6 +348,15 @@ describe('security integration tests', function () {
expect(link.getAttribute('href')).toEqual('unsafe:javascript:alert(1)');
});

it('should throw error on translated event attributes', () => {
const template = `<img src="/missing-image.png" onerror="void 0" i18n-onerror>`;
TestBed.overrideComponent(SecuredComponent, {set: {template}});

expect(() => TestBed.createComponent(SecuredComponent)).toThrowError(
/Translating attribute 'onerror' is disallowed for security reasons./,
);
});

it('should throw error on security-sensitive attributes with constant values', () => {
const template = `<iframe srcdoc="foo" i18n-srcdoc></iframe>`;
TestBed.overrideComponent(SecuredComponent, {set: {template}});
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