Angular Service Worker Policy-Bypass & Credential-Stripping Vulnerabilities
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, 19.2.23
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.15 20.3.22, and 19.2.23, an issue in the @angular/service-worker package compromises the integrity of request-policy enforcement during request reconstruction. When the Angular Service Worker intercepts network requests for matched assets, it reconstructs a new Request object using an internal helper function. During this reconstruction process, the helper function strips the strict, client-defined request redirect policy configuration (such as redirect: 'error'), falling back to the browser's default 'follow' strategy. If the target web application makes client-side requests with a strict policy (e.g., expecting a network error instead of automatically following redirects), the service worker will bypass this instruction and automatically follow HTTP 3xx redirects to other destinations. This acts as an unintended proxy/intermediary ("Confused Deputy") and can result in cookie/credential exposure or same-origin session-restricted data leakage if public dynamic routes redirect to sensitive routes. This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- angular angular
From 22.0.0-next.0 · fixed in 22.0.0-rc.2; From 21.0.0-next.0 · fixed in 21.2.15; From 20.0.0-next.0 · fixed in 20.3.22; From 19.0.0-next.0 · fixed in 19.2.23; through 18.2.14
- @angular/service-workernpm
From 22.0.0-next.0 · fixed in 22.0.0-rc.2
- @angular/service-workernpm
From 20.0.0-next.0 · fixed in 20.3.22
- @angular/service-workernpm
From 19.0.0-next.0 · fixed in 19.2.23
- @angular/service-workernpm
through 18.2.14
- @angular/service-workernpm
From 21.0.0-next.0 · fixed in 21.2.15