CVE-2026-55428

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, the tailnet coordinator validates that an agent's `Addresses` derive from its authenticated UUID but applies no equivalent check to `AllowedIPs`. The coordinator forwards agent-supplied `AllowedIPs` verbatim to tunnel peers which install them into the WireGuard peer configuration. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 validates each `AllowedIPs` prefix against the authenticating agent's UUID just like `Addresses`. As a workaround, monitor coordinator logs for agents advertising unexpected `AllowedIPs` prefixes.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/coder/coder/pull/26144	Issue Tracking Patch
https://github.com/coder/coder/releases/tag/v2.29.17	Release Notes
https://github.com/coder/coder/releases/tag/v2.32.7	Release Notes
https://github.com/coder/coder/releases/tag/v2.33.8	Release Notes
https://github.com/coder/coder/releases/tag/v2.34.2	Release Notes
https://github.com/coder/coder/security/advisories/GHSA-wrq8-fcv5-8hvp	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*

History

No history.

Information

Published : 2026-07-08 00:16

Updated : 2026-07-08 19:44

NVD link : CVE-2026-55428

Mitre link : CVE-2026-55428

CVE.ORG link : CVE-2026-55428

JSON object : View

Products Affected

coder

coder

CWE

CWE-285

Improper Authorization

CWE-863

Incorrect Authorization

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