GHSA-vvvv-983w-r7pv is a medium-severity (CVSS 4.3) Open Redirect vulnerability in @workos/authkit-session. O3 Security confirms whether GHSA-vvvv-983w-r7pv is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
@workos/authkit-session has an Open Redirect via state-derived redirect target
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
@workos/authkit-sessionnpmDescription
An open redirect vulnerability exists in AuthService.handleCallback due to insufficient validation of the returnPathname value derived from the OAuth state parameter.
The state parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As a result, attacker-controlled values (e.g., https://evil.com/, //evil.com, or similar variants) may be returned to the application.
If this value is used directly in a redirect (e.g., via an HTTP Location header, framework redirect helpers, or client-side navigation), it may cause the user to be redirected to an external, attacker-controlled site.
Security Impact This issue may be used to facilitate phishing or user redirection attacks by leveraging the trust of the originating domain. For example, an attacker could craft a link that directs a user through a legitimate authentication flow and then redirects them to an external site.
The severity depends on how returnPathname is used by the application. Exploitation requires:
- The application to use
returnPathnameas a redirect target, and - The absence of downstream validation or allowlisting
This vulnerability does not enable authentication bypass, token disclosure, or direct account compromise on its own, but may increase the effectiveness of social engineering attacks when combined with user interaction.
Vulnerability Type CWE-601: URL Redirection to Untrusted Site (Open Redirect)
Patches Patched in https://github.com/workos/authkit-session/releases/tag/v0.5.1
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @workos/authkit-session | all versions | 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 @workos/authkit-session. 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 @workos/authkit-session to 0.5.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-vvvv-983w-r7pv 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-vvvv-983w-r7pv 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-vvvv-983w-r7pv. 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-vvvv-983w-r7pv in your dependencies?
O3 detects GHSA-vvvv-983w-r7pv across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.