AUGUST 25, 2026
Live Feed
Back to database
Case File

CVE-2026-55428

HIGH · CVSS 8.2 EPSS 0.25% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

The vulnerability affects the tailnet coordinator in Coder's remote development environment provisioning, where it fails to validate `AllowedIPs` against the authenticated UUID, potentially allowing unauthorized IP addresses to be forwarded to tunnel peers. This oversight can lead to unauthorized access and data exposure within the network. Organizations using affected versions should prioritize updating to the fixed versions or implement monitoring of coordinator logs for unexpected `AllowedIPs` to mitigate risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55428
Severity
HIGH
CVSS
8.2
EPSS
0.25%

Original NVD 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, 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)