{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-88058","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-09T21:22:45.434Z","datePublished":"2026-09-10T18:56:03.369Z","dateUpdated":"2026-09-11T15:14:37.967Z"},"containers":{"cna":{"title":"Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-116","lang":"en","description":"CWE-116: Improper Encoding or Escaping of Output","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-j3r3-mxqp-r2p4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4"},{"name":"https://github.com/angular/angular/issues/70146","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/issues/70146"},{"name":"https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915"},{"name":"https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef"},{"name":"https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8"},{"name":"https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f","tags":["x_refsource_MISC"],"url":"https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f"},{"name":"https://github.com/angular/angular/releases/tag/v20.3.30","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/releases/tag/v20.3.30"},{"name":"https://github.com/angular/angular/releases/tag/v21.2.22","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/releases/tag/v21.2.22"},{"name":"https://github.com/angular/angular/releases/tag/v22.1.4","tags":["x_refsource_MISC"],"url":"https://github.com/angular/angular/releases/tag/v22.1.4"}],"affected":[{"vendor":"angular","product":"angular","versions":[{"version":"<= 19.2.25","status":"affected"},{"version":">= 20.0.0, < 20.3.30","status":"affected"},{"version":">= 21.0.0, < 21.2.22","status":"affected"},{"version":">= 22.0.0, < 22.1.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-10T18:56:03.369Z"},"descriptions":[{"lang":"en","value":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular server-side rendering (SSR) in @angular/platform-server serializes ProcessingInstruction DOM nodes inside fallback raw-content elements without escaping matching ancestor closing tags. ProcessingInstruction data escaped greater-than characters but left less-than characters untouched and did not inspect fallback ancestors, so data such as a matching closing tag prematurely terminates noscript, iframe, noembed, or noframes containers. The vulnerable nodes cannot be authored through standard Angular templates; reachability requires application or library code using inject(DOCUMENT).createProcessingInstruction with attacker-controlled data or Renderer2 DOM insertion inside a fallback container. In HTML5 RAWTEXT parsing, the premature close causes subsequent sibling elements to be interpreted as live HTML and enables arbitrary JavaScript execution in a victim's browser. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4."}],"source":{"advisory":"GHSA-j3r3-mxqp-r2p4","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4","tags":["exploit"]},{"url":"https://github.com/angular/angular/issues/70146","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-11T15:14:28.505071Z","id":"CVE-2026-88058","options":[{"Exploitation":"poc"},{"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":"2026-09-11T15:14:37.967Z"}}]}}