GHSA-4g8v-vg43-wpgf is a medium-severity (CVSS 4) CWE-116 vulnerability in actionpack. O3 Security confirms whether GHSA-4g8v-vg43-wpgf is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Actionpack has possible cross-site scripting vulnerability via User Supplied Values to redirect_to
Real-World Exposure
actionpack💎actionpackReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
The redirect_to method in Rails allows provided values to contain characters which are not legal in an HTTP header value. This results in the potential for downstream services which enforce RFC compliance on HTTP response headers to remove the assigned Location header. This vulnerability has been assigned the CVE identifier CVE-2023-28362.
Versions Affected: All. Not affected: None Fixed Versions: 7.0.5.1, 6.1.7.4
Impact
This introduces the potential for a Cross-site-scripting (XSS) payload to be delivered on the now static redirection page. Note that this both requires user interaction and for a Rails app to be configured to allow redirects to external hosts (defaults to false in Rails >= 7.0.x).
Releases
The FIXED releases are available at the normal locations.
Workarounds
Avoid providing user supplied URLs with arbitrary schemes to the redirect_to method.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | actionpack | all versions | 6.1.7.4 |
| 💎RubyGems | actionpack | ≥ 7.0.0&&< 7.0.5.1 | 7.0.5.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for actionpack. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update actionpack to 6.1.7.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4g8v-vg43-wpgf is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-4g8v-vg43-wpgf is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-4g8v-vg43-wpgf. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-4g8v-vg43-wpgf in your dependencies?
O3 detects GHSA-4g8v-vg43-wpgf across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.