{"id":"CVE-2026-88058","revision":"305fb171b3754bdc829fd79adf18323b","records":[{"revision":"305fb171b3754bdc829fd79adf18323b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-88058","aliases":[],"title":"Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements","description":"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.","state":0,"publishedAt":"2026-09-10T18:56:03.369+00:00","modifiedAt":"2026-09-11T15:14:37.967+00:00","affected":[{"ecosystem":"Vendor product","name":"angular","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"angular\",\n                    \"product\": \"angular\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 19.2.25\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 20.0.0, < 20.3.30\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 21.0.0, < 21.2.22\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 22.0.0, < 22.1.4\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":8.6,"severity":"HIGH"}],"references":["https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4","https://github.com/angular/angular/issues/70146","https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915","https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef","https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8","https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f","https://github.com/angular/angular/releases/tag/v20.3.30","https://github.com/angular/angular/releases/tag/v21.2.22","https://github.com/angular/angular/releases/tag/v22.1.4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-88058","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-88058","identifiers":["CVE-2026-88058"]},"retained":false,"historicalAffected":[]}],"coverage":[]}