CVE-2026-55428

Severity CVSS v4.0:

Pending analysis

Type:

CWE-285 Improper Authorization

Publication date:

08/07/2026

Last modified:

08/07/2026

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&#39;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&#39;s UUID just like `Addresses`. As a workaround, monitor coordinator logs for agents advertising unexpected `AllowedIPs` prefixes.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.20 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

8.20

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:coder:coder::::::go::*		2.29.17 (excluding)
cpe:2.3:a:coder:coder::::::go::*	2.30.0 (including)	2.32.7 (excluding)
cpe:2.3:a:coder:coder::::::go::*	2.33.0 (including)	2.33.8 (excluding)
cpe:2.3:a:coder:coder::::::go::*	2.34.0 (including)	2.34.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-55428

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools