Red Hat Security Advisory: mod_security security update
ModSecurity is an open source intrusion detection and prevention engine for web applications. Security Fix(es): * mod_security: ModSecurity Denial of Service Vulnerability (CVE-2025-48866) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
CVE-2025-48866 is a denial of service vulnerability in ModSecurity, an open source web application firewall engine. The vulnerability affects ModSecurity packages included in Red Hat Enterprise Linux 9 and related distributions. Red Hat Product Security has rated this vulnerability as moderate impact and has released updated mod_security packages (version 2.9.6-2.el9_6.1) to fix the issue. The advisory references Red Hat Security Advisory RHSA-2025:12838 for detailed remediation instructions and package downloads.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to cause a denial of service condition in ModSecurity, potentially disrupting web application protection services. The severity is rated moderate by Red Hat, indicating a limited but notable impact on availability.
Mitigation Recommendations
Red Hat has released updated mod_security packages that address CVE-2025-48866. Users of affected Red Hat Enterprise Linux 9 variants should apply the security update as described in Red Hat Security Advisory RHSA-2025:12838 and the related article https://access.redhat.com/articles/11258. Applying these official patches will remediate the vulnerability. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: mod_security security update
Description
ModSecurity is an open source intrusion detection and prevention engine for web applications. Security Fix(es): * mod_security: ModSecurity Denial of Service Vulnerability (CVE-2025-48866) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
pkg:rpm/redhat/mod_securityRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-48866 is a denial of service vulnerability in ModSecurity, an open source web application firewall engine. The vulnerability affects ModSecurity packages included in Red Hat Enterprise Linux 9 and related distributions. Red Hat Product Security has rated this vulnerability as moderate impact and has released updated mod_security packages (version 2.9.6-2.el9_6.1) to fix the issue. The advisory references Red Hat Security Advisory RHSA-2025:12838 for detailed remediation instructions and package downloads.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to cause a denial of service condition in ModSecurity, potentially disrupting web application protection services. The severity is rated moderate by Red Hat, indicating a limited but notable impact on availability.
Mitigation Recommendations
Red Hat has released updated mod_security packages that address CVE-2025-48866. Users of affected Red Hat Enterprise Linux 9 variants should apply the security update as described in Red Hat Security Advisory RHSA-2025:12838 and the related article https://access.redhat.com/articles/11258. Applying these official patches will remediate the vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:13775
- Cve Count
- 1
Threat ID: 6a419cb727e9c79719abd8a5
Added to database: 06/28/2026, 22:14:15 UTC
Last enriched: 07/12/2026, 11:12:11 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 24
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