CVE-2026-61812
Published:September 30, 2026
Updated:October 01, 2026
The t:htmlEntityDecode transformation in OWASP ModSecurity decodes only five named HTML entities (and in v3 matches entity-name prefixes, e.g. <est; decodes to <), so payloads using other entities such as : evade rules. Affects v2 2.1.0-rc7 through 2.9.14 (fixed 2.9.15) and v3 3.0.0-rc1 through 3.0.16 (fixed 3.0.17).
Affected Packages
https://github.com/owasp-modsecurity/ModSecurity.git (GITHUB):
Affected version(s) >=v3.0.0-rc1 <v3.0.17Fix Suggestion:
Update to version v3.0.17https://github.com/owasp-modsecurity/ModSecurity.git (GITHUB):
Affected version(s) >=v2.1.0-rc7 <v2.9.15Fix Suggestion:
Update to version v2.9.15Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Encoding Error