vulnerability / NVI-00016227 / Revision 1
Angular Service Worker Policy-Bypass & Credential-Stripping Vulnerabilities
GitHub lists this reviewed advisory for @angular/service-worker, @angular/service-worker, @angular/service-worker, @angular/service-worker, @angular/service-worker. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
6.1 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
@angular/service-worker
source listed>= 22.0.0-next.0, < 22.0.0-rc.2
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. ### Impact Web applications registering the `@angular/service-worker` package are vulnerable to this redirect-policy bypass if they make safe client-side fetch calls (such as `{ redirect: 'error' }`) t
@angular/service-worker
source listed>= 20.0.0-next.0, < 20.3.22
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. ### Impact Web applications registering the `@angular/service-worker` package are vulnerable to this redirect-policy bypass if they make safe client-side fetch calls (such as `{ redirect: 'error' }`) t
@angular/service-worker
source listed>= 19.0.0-next.0, < 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. ### Impact Web applications registering the `@angular/service-worker` package are vulnerable to this redirect-policy bypass if they make safe client-side fetch calls (such as `{ redirect: 'error' }`) t
@angular/service-worker
source listed<= 18.2.14
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. ### Impact Web applications registering the `@angular/service-worker` package are vulnerable to this redirect-policy bypass if they make safe client-side fetch calls (such as `{ redirect: 'error' }`) t
@angular/service-worker
source listed>= 21.0.0-next.0, < 21.2.15
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. ### Impact Web applications registering the `@angular/service-worker` package are vulnerable to this redirect-policy bypass if they make safe client-side fetch calls (such as `{ redirect: 'error' }`) t
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-gv2q-mqqv-365m ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.