Unintended Proxy or Intermediary in Angular - CVE-2026-50169
Published: September 11, 2026
Vulnerability identifier: #VU149002
CSH Severity: Medium
CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-50169
CWE-ID: CWE-441
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper preservation of request redirect policies in the @angular/service-worker request reconstruction helper when intercepting network requests for matched assets. A remote attacker can trigger a client-side request to follow a redirect to a sensitive same-origin route to disclose sensitive information.
Exploitation requires an active Angular Service Worker, a matched asset group route that redirects to a session-restricted same-origin route, an active user session, and a client-side fetch configured with redirect: 'error'.
Affected software
Angular
How to mitigate CVE-2026-50169
Install security update from vendor's website.
Angular - addressed in versions 19.2.23, 20.3.22, 21.2.15, 22.0.0