CVE-2026-45796: Coder vulnerable to unauthenticated SSRF via Azure Instance Identity Endpoint

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-07 · updated 2026-07-08
Weakness: CWE-918

Description

Coder allows organizations to provision remote development environments via Terraform. Versions prior tp 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3 are vulnerable to unauthenticated semi-blind Server-Side Request Forgery (SSRF) via the Azure instance identity endpoint (`POST /api/v2/workspaceagents/azure-instance-identity`). An external attacker can force the Coder server to issue HTTP GET requests to arbitrary internal or external hosts by submitting a crafted PKCS#7 signature. The server does not return the target's response body, but error messages in the API response reveal whether the target is reachable and what type of failure occurred. Versions 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3 patch the issue. As a workaround, if the Azure identity-auth mechanism is not being used then restrict access to the corresponding endpoint (`/api/v2/workspaceagents/azure-instance-identity`) using ingress firewall and/or proxy ACLs.

Affected products

coder: before 2.24.5; from 2.29.0 before 2.29.13; from 2.30.0 before 2.30.8; from 2.31.0 before 2.31.12; from 2.32.0 before 2.32.2; from 2.33.0 before 2.33.3 — fixed in 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, 2.33.3

How to fix

Upgrade to a fixed version: coder 2.24.5, 2.29.13, 2.30.8, 2.31.12. Check the vendor advisory for mitigations.

References

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