CVE-2026-55436

HIGH

Coder's AI Bridge Proxy skips TLS certificate verification in default configuration

Title source: cna
STIX 2.1

Description

Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.30.0 and prior to versions 2.32.7, 2.33.8, and 2.34.2, the AI Bridge Proxy (`aibridgeproxyd`) created a goproxy server whose default transport set `InsecureSkipVerify: true` and only assigned a secure transport when an upstream proxy was configured. In the default configuration (no upstream proxy), outbound HTTPS to the Coder access URL accepted any TLS certificate. Practical exploitation requires an on-path (man-in-the-middle) position between the AI Bridge Proxy and the Coder server. Deployments where they are co-located over loopback are effectively unaffected. The fix in versions 2.32.7, 2.33.8, and 2.34.2 applies the secure transport (TLS 1.2 or higher using system root CAs) unconditionally. As a workaround, ensure the Coder access URL uses a trusted certificate and secure the network path between the AI Bridge Proxy and the Coder server (for example, loopback or mTLS).

References (5)

Core 5
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/pull/26131
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.32.7
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.33.8
X_Refsource_Misc x_refsource_misc
https://github.com/coder/coder/releases/tag/v2.34.2

Scores

CVSS v3 7.4
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Details

CWE
CWE-295
Status published
Products (3)
coder/coder >= 2.30.0, < 2.32.7
coder/coder >= 2.33.0, < 2.33.8
coder/coder >= 2.34.0, < 2.34.2
Published Jul 08, 2026
Tracked Since Jul 08, 2026