CVE-2023-26359: Adobe ColdFusion Deserialization of Untrusted Data Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2023-08-21. EPSS: 17% chance of exploitation in the next 30 days.

Adobe ColdFusion versions 2018 Update 15 (and earlier) and 2021 Update 5 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction.

Affected products

• Adobe ColdFusion: version 2018 only; version 2021 only

Published 2023-03-23. Last modified 2026-06-17.