Qwik City Open Redirect via fixTrailingSlash

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

2.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/E:U · score source

EPSS

• CVE-2026-25149: 0.27% estimated exploitation activity in the next 30 days; percentile 19.20 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary Description An Open Redirect (CWE-601) vulnerability in Qwik City's default request handler middleware allows a remote attacker to redirect users to arbitrary protocol-relative URLs. Successful exploitation permits attackers to craft convincing phishing links that appear to originate from the trusted domain but redirect the victim to an attacker-controlled site. This affects qwik-city before version 1.19.0. This has been patched in qwik-city version 1.19.0. Impact Qwik City automatically applies the fixTrailingSlash middleware to page routes to ensure URL consistency. This vulnerability impacts all Qwik City applications deployed to runtimes that have a catch-all path to match arbitrary domains and that do not automatically normalize URL paths (e.g. Bun). Exploitation allows an attacker to craft links that trigger a 301 redirect to arbitrary protocol-relative URLs. Browsers interpret this Location header as a protocol-relative URL, redirecting the user to attacker-controlled…

Published by the source

3 Feb 2026, 20:58 UTC

Last modified by the source

4 Feb 2026, 18:06 UTC

Source last checked

26 Oct 2026, 12:42 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-92j7-wgmg-f32m

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-92j7-wgmg-f32m

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# Patch Next advisory brief: CVE-2026-25149

Advisory: Qwik City Open Redirect via fixTrailingSlash
IDs: CVE-2026-25149, GHSA-92j7-wgmg-f32m
Record: https://patchnext.com/advisories/cve-2026-25149 (revision 3, source checked 26 Oct 2026, 12:42 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 2.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @builder.io/qwik-city 1.19.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @builder.io/qwik-city: affected < 1.19.0; fixed in 1.19.0

## Suggested inspection (read-only)
- `npm ls @builder.io/qwik-city --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @builder.io/qwik-city.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-92j7-wgmg-f32m (OSV record GHSA-92j7-wgmg-f32m lists affected ranges: npm @builder.io/qwik-city >=0 <1.19.0 (fixed))
- Verified: https://github.com/advisories/GHSA-92j7-wgmg-f32m (GitHub-reviewed advisory GHSA-92j7-wgmg-f32m lists affected ranges: npm @builder.io/qwik-city >=0 <1.19.0)

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