# CVE-2026-46354: Coder signature verification bypass in Azure instance identity validation

Source: https://junglewise.ai/threats/cve-2026-46354-coder-signature-verification-bypass-in-azure-instance-identity  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-07. Updated: 2026-07-07  
License: CC BY 4.0 with a link back

CVE-2026-46354 · Severity: critical · CVSS 9.1 · Published 2026-07-07

Coder, a platform for managing remote development environments, contains a security flaw in how it verifies Azure identities. An attacker can bypass security checks to impersonate a legitimate development workspace and obtain its session token. This could allow an unauthorized user to gain access to sensitive development environments and the data within them. Organizations using Azure-based templates are advised to update to a patched version or switch to token-based authentication.

Technologies: [Coder](https://junglewise.ai/threats/technologies/coder), [github.com/coder/coder (Go)](https://junglewise.ai/threats/technologies/github-com-coder-coder), [github.com/coder/coder/v2 (Go)](https://junglewise.ai/threats/technologies/github-com-coder-coder-v2). Vendors: [Coder](https://junglewise.ai/threats/vendors/coder), [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-46354 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-46354 being exploited in the wild.

**How severe is CVE-2026-46354?** Critical severity, with a CVSS score of 9.1, published 7 July 2026.

**Which products and versions are affected?** Coder < 2.24.5, >= 2.29.0 < 2.29.13, >= 2.30.0 < 2.30.8, >= 2.31.0 < 2.31.12, >= 2.32.0 < 2.32.2, >= 2.33.0 < 2.33.3, < 2.24.5, 2.29.x < 2.29.13, 2.30.x < 2.30.8, 2.31.x < 2.31.12, 2.32.x < 2.32.2, 2.33.x < 2.33.3; github.com/coder/coder (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=0.27.3; github.com/coder/coder/v2 (Go) SEMVER:introduced=0,fixed=2.24.5,introduced=2.29.0,fixed=2.29.13,introduced=2.30.0,fixed=2.30.8,introduced=2.31.0,fixed=2.31.12,introduced=2.32.0-rc.0,fixed=2.32.2,introduced=2.33.0-rc.0,fixed=2.33.3, SEMVER:introduced=2.33.0-rc.0,fixed=2.33.3.

**Is there a fix for CVE-2026-46354?** Yes. github.com/coder/coder/v2 (Go): upgrade to 2.33.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-46354 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-46354?** Check whether you run Coder, github.com/coder/coder (Go) or github.com/coder/coder/v2 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/coder/coder/v2 (Go): upgrade to 2.33.3 or later

  ```sh
  go get github.com/coder/coder/v2@v2.33.3
  ```


## Technical details

A vulnerability exists in Coder's `azureidentity.Validate()` function where it verifies that a PKCS#7 signer certificate chains to a trusted Azure CA but fails to verify the actual PKCS#7 signature. This allows a remote, unauthenticated attacker to provide a legitimate Azure certificate alongside a forged payload (such as a specific `vmId`). If the attacker knows the target's UUIDv4 `vmId`, they can successfully authenticate as that workspace and receive its session token. The issue is resolved by migrating to a library that correctly validates both the certificate chain and the signature. Patches are available in versions 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3.

## Affected products

- Coder Coder < 2.24.5, >= 2.29.0 < 2.29.13, >= 2.30.0 < 2.30.8, >= 2.31.0 < 2.31.12, >= 2.32.0 < 2.32.2, >= 2.33.0 < 2.33.3

## Identifiers

- CVE-2026-46354
- GHSA-6x44-w3xg-hqqf
- GO-2026-5196

## Timeline

- 2026-05-13: patched: Fix merged and releases published
- 2026-07-07: disclosed: CVE published to NVD

## References

- [https://github.com/coder/coder/pull/25286](https://github.com/coder/coder/pull/25286)
- [https://github.com/coder/coder/releases/tag/v2.24.5](https://github.com/coder/coder/releases/tag/v2.24.5)
- [https://github.com/coder/coder/releases/tag/v2.29.13](https://github.com/coder/coder/releases/tag/v2.29.13)
- [https://github.com/coder/coder/releases/tag/v2.30.8](https://github.com/coder/coder/releases/tag/v2.30.8)
- [https://github.com/coder/coder/releases/tag/v2.31.12](https://github.com/coder/coder/releases/tag/v2.31.12)
- [https://github.com/coder/coder/releases/tag/v2.32.2](https://github.com/coder/coder/releases/tag/v2.32.2)
- [https://github.com/coder/coder/releases/tag/v2.33.3](https://github.com/coder/coder/releases/tag/v2.33.3)

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