Authorization Bypass Through User-Controlled Key Affecting github.com/coder/coder/coderd/agentapi package, versions >=0.0.0
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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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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMCODERCODERCODERDAGENTAPI-17872157
- published6 Jul 2026
- disclosed6 Jul 2026
- creditUnknown
Introduced: 6 Jul 2026
CVE-2026-55429 (opens in a new tab)How to fix?
There is no fixed version for github.com/coder/coder/coderd/agentapi.
Overview
Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the UpsertWorkspaceApp process. An attacker can gain unauthorized access to another user's workspace app by submitting a crafted payload with a known victim app UUID and an attacker-controlled agent ID, resulting in the victim's app traffic being proxied to the attacker's workspace. This is only exploitable if the attacker has elevated access as a template author or external provisioner operator.