Open Redirect Affecting github.com/coder/coder/v2/cli package, versions <2.29.17>=2.30.0 <2.32.7>=2.33.0 <2.33.8>=2.34.0 <2.34.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMCODERCODERV2CLI-17872218
- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-55431 Â (opens in a new tab)How to fix?
Upgrade github.com/coder/coder/v2/cli to version 2.29.17, 2.32.7, 2.33.8, 2.34.2 or higher.
Overview
Affected versions of this package are vulnerable to Open Redirect via the coder open app process. An attacker can obtain a user's session token and impersonate their account by crafting a malicious external app URL containing a session token placeholder, which is then replaced with the real session token and sent to an attacker-controlled host. This is only exploitable if the victim runs coder open app against a workspace whose external app definition is controlled by the attacker.
Workaround
This vulnerability can be mitigated by avoiding the use of coder open app for untrusted workspaces.