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CVE-2026-46354

📛 CVE Title

(no title)

⬇ Download JSON ⚠ View as Threat

Description

Coder: PKCS#7 signature bypass in Azure instance identity allows unauthenticated agent token theft

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-46354 on 2026-08-01. Shown when MITRE's text differs from the cvelistV5 mirror.

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`.

Overview

State
—
Assigner (CNA)
—
CVSS severity
critical
CVSS score
CVSS 9.1 / 10 9.1 9.1 / 10
CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Effective score
9.1 / 10 CRITICAL source: CNA overview
CWE(s)
—
Reserved
—
Published
—
Last updated
—
Source
https://www.tenable.com/cve/CVE-2026-46354
Linked Threat
CVE-2026-46354 — CVE-2026-46354

NVD / KEV / EPSS data refreshed 2026-05-25 00:09 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-42111
Assigner
GitHub_M
Published
Jul 7, 2026, 9:10:01 PM
Updated
Jul 8, 2026, 1:01:25 PM
EUVD base score (CVSS 3.1)
9.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EUVD-reported EPSS
0.2600
Vendors
coder
Products
coder (2.30.0, < 2.30.8)
coder (< 2.24.5)
coder (2.33.0-rc.0, < 2.33.3)
coder (2.31.0, < 2.31.12)
coder (2.29.0, < 2.29.13)
coder (2.32.0-rc.0, < 2.32.2)
Aliases
GHSA-6x44-w3xg-hqqf

ENISA 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`.

EUVD references (8)

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (8) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Oracle Critical Patch Update, April 2026 Security Update Review
    web:blog.qualys.com

    Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.

    2026-05-26 02:56 UTC
  • Oracle Releases Critical Security Patch Fixing 337 Vulnerabilities ...
    web:cyberpress.org

    Oracle has released its January 2026 Critical Patch Update (CPU), delivering security patches for 337 vulnerabilities across multiple product families. Published through Oracle's Security Alerts portal, the advisory emphasizes the cumulative nature of these patches and strongly recommends immediate deployment across enterprise environments to ...

    2026-05-26 02:56 UTC
  • CVE-2026-46354 | Security Details | Sonatype Guide
    web:guide.sonatype.com

    Technical security analysis for CVE-2026-46354 . CVSS 9.1 severity. View CVSS vectors, CWE classifications, and exploit maturity ratings.

    2026-05-26 02:56 UTC
  • Security Advisories and Bulletins | Microsoft Learn
    web:learn.microsoft.com

    Learning path Learn how Microsoft supports secure software development as part of a cybersecurity solution - Training Secure software development means integrating security into each phase of your development lifecycle, from requirements analysis to maintenance. Microsoft provides many services that can help you develop more secure code and deploy a more secure application in the cloud. This ...

    2026-05-26 02:56 UTC
  • Nvd - Cve-2026-42354
    web:nvd.nist.gov

    An official website of the United States government Here's how you know

    2026-05-26 02:56 UTC
  • Fix CVE-2026-46354 Coder Vulnerability | Orca Security
    web:orca.security

    A critical vulnerability ( CVE-2026-46354 , CVSS 9.1) was disclosed affecting Coder, a popular open-source remote development platform, allowing attackers to steal workspace agent session tokens, Git SSH private keys, and OAuth credentials via a forged PKCS#7 signature bypass. Due to the unauthenticated nature of the attack and the breadth of potential secret exposure, immediate patching is ...

    2026-05-26 02:56 UTC
  • Critical Patches Issued for Microsoft Products, April 14, 2026
    web:www.cisecurity.org

    <p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

    2026-05-26 02:56 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-05-26 02:56 UTC
  • April 2026 Third-Party Vulnerabilities and Patches | Recast
    web:www.recastsoftware.com

    This April was the most active month observed so far in terms of third‑party vulnerability disclosures and remediation activity. During the month, 360 unique vulnerabilities were identified across 96 applications, with vendors releasing 172 patched versions to address these issues. Compared to earlier months, April represents a clear peak in both vulnerability volume and patch output ...

    2026-05-26 02:56 UTC
  • Patch Tuesday May 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-05-26 02:56 UTC

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-46354.json.

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