CVE-2026-45796 Coder vulnerable to unauthenticated SSRF via Azure Instance Identity Endpoint
Unauthenticated attackers can force the Coder server to make arbitrary HTTP requests, potentially revealing internal network reachability and bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45796?
CVE-2026-45796 is a medium-severity server-side request forgery vulnerability in coder, published on 7 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-45796?
16 open source packages ship an affected version, including github.com/coder/coder/v2 and github.com/coder/coder. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/coder/coder/v2 Go | All versions | 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, 2.33.3 |
github.com/coder/coder/v2 Go | All versions | 2.24.5 |
github.com/coder/coder/v2 Go | All versions | 2.24.5 |
github.com/coder/coder/v2 Go | From 2.29.0 | 2.29.13 |
github.com/coder/coder/v2 Go | From 2.29.0 | 2.29.13 |
github.com/coder/coder/v2 Go | From 2.30.0 | 2.30.8 |
10 more packages
github.com/coder/coder/v2 Go | From 2.30.0 | 2.30.8 |
github.com/coder/coder/v2 Go | From 2.31.0 | 2.31.12 |
github.com/coder/coder/v2 Go | From 2.31.0 | 2.31.12 |
github.com/coder/coder/v2 Go | From 2.32.0-rc.0 | 2.32.2 |
github.com/coder/coder/v2 Go | From 2.32.0-rc.0 | 2.32.2 |
github.com/coder/coder/v2 Go | From 2.33.0-rc.0 | 2.33.3 |
github.com/coder/coder/v2 Go | From 2.33.0-rc.0 | 2.33.3 |
github.com/coder/coder Go | All versions | None |
github.com/coder/coder Go | All versions to 0.27.3 | None |
github.com/coder/coder Go | All versions to 0.27.3 | None |
Products include Coder Coder.
How do I fix CVE-2026-45796?
Upgrade github.com/coder/coder/v2 to a fixed version for your release line: 2.24.5, 2.29.13, 2.30.8 or 2.31.12.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-45796 being exploited?
There is no known exploitation of CVE-2026-45796 in the wild and no public exploit code.
Other vulnerabilities in coder
- CVE-2026-46354 Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft
- CVE-2026-55429 Coder's workspace app upsert allows cross-workspace agent rebinding via user-controlled app ID
- CVE-2026-55427 Coder vulnerable to SSH config injection via unsanitized server-supplied values in `coder config-ssh`
- CVE-2026-55428 Coder: Route hijacking through lack of validation of agent-supplied AllowedIPs in tailnet coordinator
- CVE-2024-27918 Coder's OIDC authentication allows email with partially matching domain to register
Sources
Also known as GHSA-686c-7vgv-v3fx, GO-2026-5169.