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ColdfusionApplication · Adobe

CVE-2026-27306

HIGH · 8.4 CVSS v3.1 Published 2026-04-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
86/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
ColdFusion versions 2023.18, 2025.6 and earlier are affected by an Improper Input Validation vulnerability that could result in arbitrary code execution in the context of the current user. Attacker requires elevated privileges. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

ColdFusion versions 2023.18, 2025.6 and earlier contain an improper input validation vulnerability that allows arbitrary code execution. An attacker with elevated privileges can exploit this by tricking a victim into opening a malicious file, executing code in the context of the current user.

MitigationRestrict elevated privileges to only necessary personnel, implement file open restrictions, and apply vendor-provided patches when Adobe releases them. User awareness training to avoid opening untrusted files reduces exploitation likelihood.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
ColdfusionApplication
Affected:= 2023= 2025

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Adjacent
Complexity
Low
Privileges
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check ColdFusion version
    Access the ColdFusion Administrator interface and navigate to the 'System Information' or 'Settings' page to view the exact version number. Alternatively, check the version file in the installation directory or run: cfadmin -version from the command line.
    Affected if The installed version is ColdFusion 2023.18 or earlier, or ColdFusion 2025.6 or earlier.
  2. Verify user privilege configuration
    Open ColdFusion Administrator and review the 'Security' > 'User Manager' section. Enumerate all users and their assigned roles, noting which accounts have Administrator or elevated privileges.
    Affected if Multiple users or unnecessary accounts possess elevated privileges beyond what is required for their job function.
  3. Inspect file upload and import settings
    Review ColdFusion Administrator settings under 'Server Settings' > 'File Manager' or any custom file upload handlers. Check for any unusual or recently added file type associations or upload endpoints.
    Affected if File upload or import functionality accepts untrusted file types without additional validation.
  4. Review recent file imports
    Examine server logs and file system directories where uploaded or imported files are stored. Look for recent files with unusual extensions, especially those that could contain malicious code.
    Affected if Any recently imported files originate from untrusted sources or show anomalous characteristics.

A user is affected if their ColdFusion installation is version 2023.18 or earlier, or 2025.6 or earlier, AND the environment has users with elevated privileges who could be tricked into opening malicious files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Restrict elevated privileges to only necessary personnel, implement file open restrictions, and apply vendor-provided patches when Adobe releases them. User awareness training to avoid opening untrusted files reduces exploitation likelihood.

Recommended fix High confidence

ColdFusion 2023.19 or later; ColdFusion 2025.7 or later

  1. 1. Log in to the Adobe ColdFusion server with administrator privileges.
  2. 2. Access the ColdFusion Administrator console (typically at https://servername:8500/CFIDE/administrator/ or https://servername:8443/CFIDE/administrator/).
  3. 3. Navigate to the Updates section in the left sidebar.
  4. 4. Check for available updates. Apply ColdFusion 2023 Update 19 (or later) for ColdFusion 2023 installations.
  5. 5. Alternatively, download the update manually from the Adobe ColdFusion downloads page (helpx.adobe.com) and run the installer.
  6. 6. After installation, restart the ColdFusion Application Server service.
  7. 7. Verify the update was applied by checking the version in ColdFusion Administrator under 'Settings' > 'Version'.
  8. 8. For ColdFusion 2025 installations, apply Update 7 (or later) following the same process.
Caveat Review Adobe ColdFusion release notes for any deprecated features or configuration changes before applying the update.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Coldfusion Scoped from the published advisory
  • Consultation6.0 h
  • Implementation4.0 h
  • Testing6.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,360
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-27306 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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