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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-116",
"CWE-79"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88058.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "19.2.25"
},
{
"introduced": "20.0.0"
},
{
"fixed": "20.3.30"
},
{
"introduced": "21.0.0"
},
{
"fixed": "21.2.22"
},
{
"introduced": "22.0.0"
},
{
"fixed": "22.1.4"
}
],
"source": [
"AFFECTED_FIELD",
"REFERENCES"
]
}