Input validation error in ColdFusion - CVE-2026-21279
Published: August 11, 2026
Vulnerability identifier: #VU141435
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-21279
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass security features.
The vulnerability exists due to improper input validation in ColdFusion when handling requests. A remote attacker can send a specially crafted request to bypass security features.
Affected software
ColdFusion
How to mitigate CVE-2026-21279
Install security update from vendor's website.
ColdFusion - addressed in versions 2023 Update 23, 2025 Update 12