Command injection in MOVEit WAF - CVE-2026-4048
Published: April 21, 2026
Vulnerability identifier: #VU126651
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-4048
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Progress Software Corporation
Affected software:
MOVEit WAF
MOVEit WAF
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary commands.
The vulnerability exists due to command injection in the UI custom WAF rule file upload process when processing unsanitized input in a custom WAF rule file. A remote user can upload a crafted file to execute arbitrary commands.
Exploitation requires All permissions.
How to mitigate CVE-2026-4048
Install security update from vendor's website.