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 in @angular/platform-server processes user-controlled resource or request URLs through HttpClient after application code validates them with WHATWG URL parsing. The resolveUrl and parseUrl utilities called String.prototype.trim(), which removed leading Unicode whitespace such as U+00A0 or U+FEFF after the input passed a same-origin check, converting a relative path into a protocol-relative attacker-controlled URL. In affected applications that attach sensitive server-side credentials such as Authorization headers to approved requests, relativeUrlsTransformerInterceptorFn then dispatched the request to the attacker-controlled origin, causing SSRF and credential disclosure. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-918"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88056.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"
]
}