Coder up to 2.26.4/2.27.6/2.28.3 Agent Manifest log file

Summaryinfo

A vulnerability was found in Coder up to 2.26.4/2.27.6/2.28.3 and classified as problematic. This affects an unknown part of the component Agent Manifest Handler. Such manipulation leads to log file. This vulnerability is documented as CVE-2025-66411. The attack needs to be performed locally. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Coder up to 2.26.4/2.27.6/2.28.3. Affected by this issue is an unknown code of the component Agent Manifest Handler. The manipulation with an unknown input leads to a log file vulnerability. Using CWE to declare the problem leads to CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. Impacted is confidentiality. CVE summarizes:

Coder allows organizations to provision remote development environments via Terraform. Prior to 2.26.5, 2.27.7, and 2.28.4, Workspace Agent manifests containing sensitive values were logged in plaintext unsanitized. An attacker with limited local access to the Coder Workspace (VM, K8s Pod etc.) or a third-party system (SIEM, logging stack) could access those logs. This vulnerability is fixed in 2.26.5, 2.27.7, and 2.28.4.

The advisory is available at github.com. This vulnerability is handled as CVE-2025-66411 since 11/29/2025. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 278305 (Coder sensitive objects logged unsanitized vulnerability (CVE-2025-66411)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.26.5, 2.27.7 or 2.28.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch e2a46393fce40bc630df3293c1ee66a596277289 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (278305) and EUVD (EUVD-2025-201015). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Coder

Version

• 2.26.0
• 2.26.1
• 2.26.2
• 2.26.3
• 2.26.4
• 2.27.0
• 2.27.1
• 2.27.2
• 2.27.3
• 2.27.4
• 2.27.5
• 2.27.6
• 2.28.0
• 2.28.1
• 2.28.2
• 2.28.3

License

• open-source

Website

• Product: https://github.com/coder/coder/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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