{"id":"CVE-2026-104871","title":"The Angular SSR is a server-rise rendering tool for Angular applications","summary":"The Angular SSR is a server-rise rendering tool for Angular applications. Prior to versions 20.3.36, 21.2.23, and 22.1.7, the CommonEngine retrieveSSGPage prerendered-page retrieval logic in @angular/ssr/node, and in @angular/ssr for ver…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-22"],"vendor":"angular","product":"angular-cli","affected":["angular-cli < 20.3.36","angular-cli >= 21.0.0, < 21.2.23","angular-cli >= 22.0.0, < 22.1.7"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T21:16:54.870","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104871","references":[{"url":"https://github.com/angular/angular-cli/commit/645e41a47d21b7651837a4250de99af0509626e2","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/commit/70748ca8e76fe4b42798719410336119d943e755","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/commit/bb72145f9ab45aee29f523236b3a25cd0813a841","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/commit/c3e5982e49705f0f6a913cb94622b4c555d2d914","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/releases/tag/v20.3.36","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/releases/tag/v21.2.23","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/releases/tag/v22.1.7","label":"security-advisories@github.com"},{"url":"https://github.com/angular/angular-cli/security/advisories/GHSA-7g7c-h8rr-7p6q","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-02T20:12:27.563771Z"},"cvssSource":"cna","ingestedAt":"2026-10-02T22:33:09.843Z","slug":"CVE-2026-104871","body":"## Overview\n\nThe Angular SSR is a server-rise rendering tool for Angular applications. Prior to versions 20.3.36, 21.2.23, and 22.1.7, the CommonEngine retrieveSSGPage prerendered-page retrieval logic in @angular/ssr/node, and in @angular/ssr for versions 17 through 18, accepts a relative request URL containing a backslash parent-traversal segment on Windows. The non-special resolve:// URL base preserves the backslash, path.join interprets it as a Windows separator, and the pagePath.startsWith(normalize(publicPath)) check incorrectly accepts a sibling output directory whose name shares the configured public-directory prefix. An unauthenticated requester can therefore retrieve a sibling prerendered HTML page when that page contains the Angular SSG marker. The issue is limited to Windows deployments that pass relative request URLs to CommonEngine.render, have a prefix-sharing sibling output directory, and contain qualifying prerendered Angular HTML; it does not provide arbitrary file read. This issue is fixed in versions 20.3.36, 21.2.23, and 22.1.7.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}