CVE-2026-55428

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-07-08 00:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-08 19:44 UTC Last updatedMost recent change to the record

Details

Published

2026-07-08 00:16 UTC

Last modified

2026-07-08 19:44 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-285

Record status

Analyzed

Affected

• Coder < 2.29.17
• Coder < 2.32.7
• Coder < 2.33.8
• Coder < 2.34.2

Attack profile CVSS 3.1 · 8.2

Attack vector

Network

Complexity

High

Privileges needed

Low

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None