CVE-2026-46354

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`.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/coder/coder/pull/25286	Issue Tracking Patch
https://github.com/coder/coder/releases/tag/v2.24.5	Release Notes
https://github.com/coder/coder/releases/tag/v2.29.13	Release Notes
https://github.com/coder/coder/releases/tag/v2.30.8	Release Notes
https://github.com/coder/coder/releases/tag/v2.31.12	Release Notes
https://github.com/coder/coder/releases/tag/v2.32.2	Release Notes
https://github.com/coder/coder/releases/tag/v2.33.3	Release Notes
https://github.com/coder/coder/security/advisories/GHSA-6x44-w3xg-hqqf	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*
	cpe:2.3:a:coder:coder::::::go::*

History

No history.

Information

Published : 2026-07-07 22:16

Updated : 2026-07-08 19:47

NVD link : CVE-2026-46354

Mitre link : CVE-2026-46354

CVE.ORG link : CVE-2026-46354

JSON object : View

Products Affected

coder

coder

CWE

CWE-347

Improper Verification of Cryptographic Signature

{"id": "CVE-2026-46354", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46354", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-08T13:01:18.394796Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "coder", "product": "coder", "versions": [{"status": "affected", "version": ">= 2.33.0-rc.0, < 2.33.3"}, {"status": "affected", "version": ">= 2.32.0-rc.0, < 2.32.2"}, {"status": "affected", "version": ">= 2.31.0, < 2.31.12"}, {"status": "affected", "version": ">= 2.30.0, < 2.30.8"}, {"status": "affected", "version": ">= 2.29.0, < 2.29.13"}, {"status": "affected", "version": "< 2.24.5"}]}]}], "published": "2026-07-07T22:16:52.467", "references": [{"url": "https://github.com/coder/coder/pull/25286", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.24.5", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.29.13", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.30.8", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.31.12", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.32.2", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/releases/tag/v2.33.3", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/coder/coder/security/advisories/GHSA-6x44-w3xg-hqqf", "tags": ["Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "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`."}], "lastModified": "2026-07-08T19:47:02.427", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "38FD51E2-14DE-4C93-8EFC-267C222E06FE", "versionEndExcluding": "2.24.5"}, {"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "055001B5-79DC-4275-91EF-8D7C45FCA8ED", "versionEndExcluding": "2.29.13", "versionStartIncluding": "2.29.0"}, {"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "7646D2AE-2363-4C43-853A-4F61C95B253B", "versionEndExcluding": "2.30.8", "versionStartIncluding": "2.30.0"}, {"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "02976D4C-3CEB-430B-A464-141A28B2CBED", "versionEndExcluding": "2.31.12", "versionStartIncluding": "2.31.0"}, {"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "4498D465-4F7F-4786-8716-43A78FBC35B8", "versionEndExcluding": "2.32.2", "versionStartIncluding": "2.32.0"}, {"criteria": "cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:*", "vulnerable": true, "matchCriteriaId": "88AFFF26-1B74-4DD4-98C7-D5FE8F17CF00", "versionEndExcluding": "2.33.3", "versionStartIncluding": "2.33.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}