Coder allows organizations to provision remote development environments via Terraform. In versions prior tp 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3, `azureidentity.Validate()` verifies that the PKCS#7 signer certificate chains to a trusted Azure CA but never verifies the PKCS#7 signature itself. An attacker can embed a legitimate Azure certificate alongside arbitrary content e.g. `{"vmId":"<target>"}` and the forged `vmId` will be accepted returning the victim workspace agent's session token. No authentication is required. The attacker only needs to know a target VM's `vmId` which is a `UUIDv4`. That's a practical limitation which would typically require prior access to be exploited. 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, reconfigure any Azure templates to use token authentication rather than `azure-instance-identity`.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
coder coder affected
Version Status Constraints
>= 2.33.0-rc.0, < 2.33.3 affected —
>= 2.32.0-rc.0, < 2.32.2 affected —
>= 2.31.0, < 2.31.12 affected —
>= 2.30.0, < 2.30.8 affected —
>= 2.29.0, < 2.29.13 affected —
< 2.24.5 affected —

No data.

No data.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-6x44-w3xg-hqqf Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/coder/coder/pull/25286 cve-icon
https://github.com/coder/coder/releases/tag/v2.24.5 cve-icon
https://github.com/coder/coder/releases/tag/v2.29.13 cve-icon
https://github.com/coder/coder/releases/tag/v2.30.8 cve-icon
https://github.com/coder/coder/releases/tag/v2.31.12 cve-icon
https://github.com/coder/coder/releases/tag/v2.32.2 cve-icon
https://github.com/coder/coder/releases/tag/v2.33.3 cve-icon
https://github.com/coder/coder/security/advisories/GHSA-6x44-w3xg-hqqf cve-icon
History

Tue, 07 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Coder
Coder coder
Vendors & Products Coder
Coder coder

Tue, 07 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Description Coder allows organizations to provision remote development environments via Terraform. In versions prior tp 2.24.5, 2.29.13, 2.30.8, 2.31.12, 2.32.2, and 2.33.3, `azureidentity.Validate()` verifies that the PKCS#7 signer certificate chains to a trusted Azure CA but never verifies the PKCS#7 signature itself. An attacker can embed a legitimate Azure certificate alongside arbitrary content e.g. `{"vmId":"<target>"}` and the forged `vmId` will be accepted returning the victim workspace agent's session token. No authentication is required. The attacker only needs to know a target VM's `vmId` which is a `UUIDv4`. That's a practical limitation which would typically require prior access to be exploited. 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, reconfigure any Azure templates to use token authentication rather than `azure-instance-identity`.
Title Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-07T21:10:01.899Z

Reserved: 2026-05-13T18:37:30.991Z

Link: CVE-2026-46354

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-08T09:00:14Z

Weaknesses