CVE-2026-55433: Coder missing authorization in devcontainer recreate endpoint

CVE-2026-55433 · Severity: medium · CVSS 5.4 · Published 2026-07-08

Coder is a platform used by organizations to manage and deploy remote development environments. A security flaw allowed users with limited permissions to trigger a destructive rebuild of development workspaces they should only be able to view. This could lead to unauthorized service disruptions and the loss of unsaved work within those environments.

Technologies: Coder, github.com/coder/coder (Go), github.com/coder/coder/v2 (Go). Vendors: Coder, Go.

Quick answers

Is CVE-2026-55433 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-55433 being exploited in the wild.
How severe is CVE-2026-55433?
Medium severity, with a CVSS score of 5.4, published 8 July 2026.
Which products and versions are affected?
Coder < 2.29.17, >= 2.30.0 < 2.32.7, >= 2.33.0 < 2.33.8, >= 2.34.0 < 2.34.2, < 2.29.17, >= 2.30.0, < 2.32.7, >= 2.33.0, < 2.33.8, >= 2.34.0, < 2.34.2; github.com/coder/coder (Go) SEMVER:introduced=0; github.com/coder/coder/v2 (Go) SEMVER:introduced=0,fixed=2.29.17,introduced=2.30.0,fixed=2.32.7,introduced=2.33.0,fixed=2.33.8,introduced=2.34.0,fixed=2.34.2, SEMVER:introduced=2.34.0,fixed=2.34.2.
Is there a fix for CVE-2026-55433?
Yes. github.com/coder/coder/v2 (Go): upgrade to 2.34.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55433 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-55433?
Check whether you run Coder, github.com/coder/coder (Go) or github.com/coder/coder/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/coder/coder/v2 (Go): upgrade to 2.34.2 or later
    go get github.com/coder/coder/v2@v2.34.2

Technical details

A missing authorization vulnerability (CWE-862) exists in Coder's devcontainer recreate endpoint. The endpoint's route middleware only verified 'ActionRead' permissions on the target workspace, failing to require 'ActionUpdate' before initiating a destructive rebuild. An attacker with a low-privileged role and read access to a workspace could exploit this over the network to force a workspace recreation. The issue has been resolved in versions 2.29.17, 2.32.7, 2.33.8, and 2.34.2 by adding an explicit 'ActionUpdate' authorization check.

Affected products

  • Coder Coder < 2.29.17, >= 2.30.0, < 2.32.7, >= 2.33.0, < 2.33.8, >= 2.34.0, < 2.34.2

Identifiers

  • CVE-2026-55433
  • GHSA-jqj2-x4c5-jfxm
  • GO-2026-5922

Timeline

  • 2026-05-28: other: Fix merged into main branch
  • 2026-06-11: patched: Security releases v2.32.7, v2.33.8, and v2.34.2 published
  • 2026-06-12: patched: Security release v2.29.17 published
  • 2026-07-08: advisory: CVE published to NVD

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.