{"id":"UBUNTU-CVE-2025-48866","details":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions prior to 2.9.10 contain a denial of service vulnerability similar to GHSA-859r-vvv8-rm8r/CVE-2025-47947. The `sanitiseArg` (and `sanitizeArg` - this is the same action but an alias) is vulnerable to adding an excessive number of arguments, thereby leading to denial of service. Version 2.9.10 fixes the issue. As a workaround, avoid using rules that contain the `sanitiseArg` (or `sanitizeArg`) action.","modified":"2026-02-04T03:51:23.820988Z","published":"2025-06-02T16:15:00Z","related":["USN-7567-1"],"upstream":["CVE-2025-48866"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-48866"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-48866"},{"type":"REPORT","url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-f82j-8pp7-cw2w"},{"type":"REPORT","url":"https://github.com/owasp-modsecurity/ModSecurity/commit/fdfc2d5b21610651b0cefceb397be2cfc7aac8bb"},{"type":"REPORT","url":"https://github.com/owasp-modsecurity/ModSecurity/commit/3a54ccea62d3f7151bb08cb78d60c5e90b53ca2e"},{"type":"REPORT","url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-859r-vvv8-rm8r"},{"type":"REPORT","url":"https://github.com/owasp-modsecurity/ModSecurity/wiki/Reference-Manual-(v2.x)#sanitisearg"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7567-1"}],"affected":[{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-apache@2.7.7-2ubuntu0.1~esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.7-2ubuntu0.1~esm2"}]}],"versions":["2.7.4-1","2.7.5-1","2.7.7-1","2.7.7-1ubuntu1","2.7.7-2","2.7.7-2ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.7.7-2ubuntu0.1~esm2"},{"binary_name":"libapache2-modsecurity","binary_version":"2.7.7-2ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}},{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-apache@2.9.0-1ubuntu0.1~esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.0-1ubuntu0.1~esm2"}]}],"versions":["2.9.0-1","2.9.0-1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.9.0-1ubuntu0.1~esm2"},{"binary_name":"libapache2-modsecurity","binary_version":"2.9.0-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}},{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-apache@2.9.2-1ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.2-1ubuntu0.1~esm2"}]}],"versions":["2.9.1-3","2.9.2-1","2.9.2-1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.9.2-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}},{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-apache@2.9.3-1ubuntu0.1+esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.3-1ubuntu0.1+esm1"}]}],"versions":["2.9.3-1","2.9.3-1ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.9.3-1ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}},{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-apache@2.9.5-1ubuntu0.1~esm2?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.5-1ubuntu0.1~esm2"}]}],"versions":["2.9.3-3","2.9.5-1","2.9.5-1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.9.5-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}},{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/modsecurity-apache@2.9.7-1ubuntu0.24.04.1~esm1?arch=source&distro=esm-apps/noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.7-1ubuntu0.24.04.1~esm1"}]}],"versions":["2.9.7-1","2.9.7-1build2","2.9.7-1build3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.9.7-1ubuntu0.24.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}},{"package":{"name":"modsecurity-apache","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/modsecurity-apache@2.9.12-2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.8-1.1","2.9.9-1","2.9.9-1ubuntu1","2.9.12-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libapache2-mod-security2","binary_version":"2.9.12-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48866.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}