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MEDIUM severity

Coder vulnerable to post-auth URL redirection to untrusted site ('Open Redirect')GHSA-wcx9-ccpj-hx3c

MEDIUMFix: coder/coder@69c1d98

GHSA-wcx9-ccpj-hx3c is a medium-severity (CVSS 4.3) Open Redirect 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.

Also known asCVE-2024-58398GO-2024-3228
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs19th percentile — riskier than 19% of all scored CVEsHighest risk
0.00%0.26%0.51%0.77%0.3%0.3%Nov 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected
🐹github.com/coder/coder/v2🐹github.com/coder/coder/v2🐹github.com/coder/coder/v2

Real-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

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/coder/coder/v2≥ 2.16.0&&< 2.16.12.16.1go get github.com/coder/coder/v2@v2.16.1
🐹Gogithub.com/coder/coder/v2≥ 2.15.0&&< 2.15.32.15.3go get github.com/coder/coder/v2@v2.15.3
🐹Gogithub.com/coder/coder/v2≥ 2.3.1&&< 2.14.42.14.4go get github.com/coder/coder/v2@v2.14.4

Detection & mitigation playbook

Open-source dependency

  1. Detect

    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.

  2. 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.

  3. Workarounds

    Stop reflecting attacker-controlled destinations: resolve every redirect target against an allowlist of paths or hosts you own, prefer a server-side key over a full URL in the request, and reject absolute URLs entirely where the flow only ever needs a relative one.

Frequently Asked Questions

### 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
O3 Security · Impact-Aware SCA

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