CVE-2026-55436

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

State
Published
Severity
7.4 High
Published
Jul 8, 2026
Updated
Jul 8, 2026
Reserved
Jun 16, 2026

Read the record on cve.org

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).

Scores

CVSSScoreVectorSource
3.17.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NGitHub_M

Weaknesses

  • CWE-295 Improper Certificate Validation

Affected Products

ProductVersions
codercoder
  • >= 2.34.0, < 2.34.2Affected
  • >= 2.33.0, < 2.33.8Affected
  • >= 2.30.0, < 2.32.7Affected

References

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