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CVE-2026-55429

8.7 · HIGH

Coder allows organizations to provision remote development environments via Terraform.

Published Jul 8, 2026CWE-639EPSS 0.51%

Overview

CVE-2026-55429 is a high-severity vulnerability. It was published on July 8, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `UpsertWorkspaceApp` overwrites an existing app's `agent_id` on a primary-key conflict and `insertAgentApp` accepts the app ID from the provisioner's `CompleteJob` payload without verifying it belongs to the workspace being built. `CompleteJob` runs under `dbauthz.AsProvisionerd` so the authorization layer does not block the cross-workspace upsert. Exploitation requires elevated access as a template author or external provisioner operator. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 verifies that any existing `workspace_apps` row matching the supplied ID belongs to the workspace being built and rejects cross-workspace agent reassignment. No known workarounds are available.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/coder/coder/pull/26103GitHubgithub.com/coder/coder/releases/tag/v2.29.17GitHubgithub.com/coder/coder/releases/tag/v2.32.7GitHubgithub.com/coder/coder/releases/tag/v2.33.8GitHubgithub.com/coder/coder/releases/tag/v2.34.2GitHubgithub.com/coder/coder/security/advisories/GHSA-9rjw-3gwp-f59v

How CyberStrike helps

Frequently asked questions

What is CVE-2026-55429?

CVE-2026-55429 is a high-severity vulnerability. It was published on July 8, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

How severe is CVE-2026-55429?

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-55429?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55429?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-55429 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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