GHSA-wcx9-ccpj-hx3c is a medium-severity (CVSS 4.3) vulnerability in github.com/coder/coder/v2. A fix is available for github.com/coder/coder/v2 — see the affected versions and patch details below.
Coder vulnerable to post-auth URL redirection to untrusted site ('Open Redirect')
Real-World Exposure
github.com/coder/coder/v2🐹github.com/coder/coder/v2🐹github.com/coder/coder/v2Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Summary
An issue on Coder's login page allows attackers to craft a Coder URL that when clicked by a logged in user could redirect them to a website the attacker controls, e.g. https://google.com.
Details
On the login page, Coder checks for the presence of a redirect query parameter. On successful login, the user would be redirected to the location of the parameter. Improper sanitization allows attackers to specify a URL outside of the Coder application to redirect users to.
Impact
Coder users could potentially be redirected to a untrusted website if tricked into clicking a URL crafted by the attacker. Coder authentication tokens are not leaked to the resulting website.
To check if your deployment is vulnerable, visit the following URL for your Coder deployment:
https://<coder url>/login?redirect=https%3A%2F%2Fcoder.com%2Fdocs
Patched Versions
This vulnerability is remedied in
- v2.16.1
- v2.15.3
- v2.14.4
All versions prior to 2.3.1 are not affected.
Thanks
References
https://github.com/coder/coder/security/advisories/GHSA-wcx9-ccpj-hx3c https://github.com/coder/coder/commit/69c1d981e3131e50d52b01f6a360abadaad699e6
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/coder/coder/v2 | ≥ 2.16.0&&< 2.16.1 | 2.16.1go get github.com/coder/coder/v2@v2.16.1 |
| 🐹Go | github.com/coder/coder/v2 | ≥ 2.15.0&&< 2.15.3 | 2.15.3go get github.com/coder/coder/v2@v2.15.3 |
| 🐹Go | github.com/coder/coder/v2 | ≥ 2.3.1&&< 2.14.4 | 2.14.4go get github.com/coder/coder/v2@v2.14.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/coder/coder/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/coder/coder/v2 to 2.16.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wcx9-ccpj-hx3c 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-wcx9-ccpj-hx3c can be triaged on real exposure rather than presence alone.
Tailored to GHSA-wcx9-ccpj-hx3c. 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-wcx9-ccpj-hx3c in your dependencies?
O3 Security finds GHSA-wcx9-ccpj-hx3c across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.