CVE-2025-47947
modsecurity: ModSecurity Has Possible DoS Vulnerability
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 22, 2025
Updated · October 22, 2026
Description
A flaw was found in the mod_security2 Apache2 module. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case. In stable released versions, when the payload's content type is application/json, at least one rule performs a sanitiseMatchedBytes action, a security control that automatically cleans or neutralizes specific patterns of potentially harmful data that prevents malicious input from reaching systems or sensitive information from leaking.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1050 · Excessive Platform Resource Consumption within a Loop