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CVE-2026-105899 – Unrestricted File Upload / RCE – Adobe ColdFusion 2025 (≤ 2025.0.13) and 2023 (≤ 2

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Summary

CVE-2026-105899 is a critical Unrestricted Upload of File with Dangerous Type vulnerability (CWE-434) in Adobe ColdFusion 2025 and 2023. It can lead to arbitrary code execution in the context of the current user, and it carries a CVSS v3.1 score of 10.0. Adobe published the fix in security bulletin APSB26-144 on October 13, 2026.

Technical details

  • Root cause: unrestricted upload of a file with a dangerous type (CWE-434).
  • Trigger conditions: no user interaction and no privileges are required.
  • Attack vector: network, with low attack complexity. The attack can be carried out remotely without authentication.
  • Impact: arbitrary code execution in the context of the current user. The scope is changed (S:C), with high impact on confidentiality, integrity and availability.
  • Adobe states it is not aware of any exploits in the wild for the issues addressed in this update.
  • Adobe has not published further technical details, such as the affected endpoint.

Affected software

  • Adobe ColdFusion 2025: 2025.0.13 and earlier
  • Adobe ColdFusion 2023: 2023.0.25 and earlier

Severity

  • CVSS v3.1 base score: 10.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: upgrade ColdFusion 2025 to 2025.0.14 and ColdFusion 2023 to 2023.0.26. Adobe’s bulletin rates the update as Priority 2 and recommends applying it as a Priority 1 update.
  • Adobe also recommends updating to the latest supported JDK/JRE LTS version and applying the security configuration settings in the ColdFusion lockdown guide for your version.
  • Adobe has not listed a workaround for this issue. Until you can patch, limit network exposure of ColdFusion servers to the Internet where possible.

References

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