{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50556","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-04T21:34:34.426Z","datePublished":"2026-06-22T15:38:28.166Z","dateUpdated":"2026-07-15T00:46:49.620Z"},"containers":{"cna":{"title":"Angular: Missing `<noscript>` Raw-Text Serialization Escaping leads to Cross-Site Scripting (XSS) in Angular SSR","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/angular/angular/security/advisories/GHSA-gxx4-3xcv-f8qx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/angular/angular/security/advisories/GHSA-gxx4-3xcv-f8qx"},{"name":"https://github.com/angular/angular/issues/68903","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/issues/68903"},{"name":"https://github.com/angular/domino/pull/29","tags":["x_refsource_MISC"],"url":"https://github.com/angular/domino/pull/29"}],"affected":[{"vendor":"angular","product":"angular","versions":[{"version":">= 22.0.0-next.0, < 22.0.0-rc.2","status":"affected"},{"version":">= 21.0.0-next.0, < 21.2.16","status":"affected"},{"version":">= 20.0.0-next.0, < 20.3.24","status":"affected"},{"version":">= 19.0.0-next.0, < 19.2.25","status":"affected"},{"version":"<= 18.2.14","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-22T15:38:28.166Z"},"descriptions":[{"lang":"en","value":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.16, 20.3.24, and 19.2.25, a Cross-Site Scripting (XSS) vulnerability exists in @angular/platform-server's DOM emulation dependency (domino) when serializing the content of <noscript> elements. When rendering dynamic text content inside a <noscript> element via template bindings (such as {{ value }} or [textContent]), the template engine expects the browser to render the content safely. Under Server-Side Rendering (SSR), domino is configured with scripting enabled, meaning <noscript> is treated as a raw-text element. However, domino's serializer completely omitted <noscript> from the list of raw-text elements requiring closing-tag escaping during DOM serialization. As a result, any occurrence of </noscript> in the bound dynamic text was never escaped under any circumstances. The unescaped closing tag was serialized directly into the output HTML (e.g. <noscript></noscript><script>alert(1)</script></noscript>). When parsed by a browser, it closes the <noscript> block early, allowing the injected <script> block to execute in the user's browser context, causing same-origin Cross-Site Scripting (XSS). This vulnerability is fixed in 22.0.0-rc.2, 21.2.16, 20.3.24, and 19.2.25."}],"source":{"advisory":"GHSA-gxx4-3xcv-f8qx","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-22T21:14:35.418340Z","id":"CVE-2026-50556","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-22T21:17:45.731Z"}},{"affected":[{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"unaffected","packageName":"dotnet5.0-build-reference-packages","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"},{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:jboss_fuse:7"],"defaultStatus":"unaffected","packageName":"platform-server","product":"Red Hat Fuse 7","vendor":"Red Hat"}],"datePublic":"2026-06-22T15:38:28.166Z","descriptions":[{"lang":"en","value":"A flaw was found in @angular/platform-server. This Cross-Site Scripting (XSS) vulnerability exists in its DOM emulation dependency, domino, when handling the content of `<noscript>` elements during server-side rendering. A remote attacker could exploit this by injecting unescaped closing `</noscript>` tags within dynamic text content. This allows for the execution of arbitrary code in the user's browser context, potentially leading to information disclosure or other malicious activities."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-50556"},{"name":"RHBZ#2491459","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491459"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50556.json"}],"timeline":[{"lang":"en","time":"2026-06-22T18:02:18.131Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-06-22T15:38:28.166Z","value":"Made public."}],"title":"@angular/platform-server: domino: Angular Platform Server: Cross-Site Scripting via unescaped `</noscript>` tags in dynamic content","x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-07-15T00:46:49.620Z"}}]}}