{"id":"CVE-2025-47947","aliases":["ALSA-2025:8837","ALSA-2025:8844","AZL-62426","BIT-modsecurity-2025-47947","BIT-modsecurity2-2025-47947","CLSA-2025-1762421346","DEBIAN-CVE-2025-47947","DLA-4192-1","DSA-5940-1","EUVD-2025-16086","GHSA-859r-vvv8-rm8r","MGASA-2025-0192","OESA-2025-1559","OESA-2025-1560","OESA-2025-1561","OESA-2025-1562","OESA-2025-1563","RHSA-2025:13680","RHSA-2025:8605","RHSA-2025:8626","RHSA-2025:8627","RHSA-2025:8674","RHSA-2025:8837","RHSA-2025:8844","RHSA-2025:8917","RHSA-2025:8922","RHSA-2025:8937","RLSA-2025:8837","RLSA-2025:8844","SUSE-SU-2025:02028-1","SUSE-SU-2025:02029-1","SUSE-SU-2025:02052-1","UBUNTU-CVE-2025-47947","USN-7567-1","openSUSE-SU-2025:15197-1"],"status":"published","title":"ModSecurity Has Possible DoS Vulnerability","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00599,"percentile":0.49137,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-1050"],"published":"2025-05-21T22:08:31Z","modified":"2026-11-05T05:36:30Z","exploits":[{"source":"pocgithub","id":"yel1337/CVE-2025-47947","title":"yel1337/CVE-2025-47947","date":"2026-10-01","url":"https://github.com/yel1337/CVE-2025-47947"}],"fixes":[{"ecosystem":"AlmaLinux:9","package":"mod_security","fixed_in":["2.9.6-2.el9_6"],"sources":["osv"]},{"ecosystem":"AlmaLinux:9","package":"mod_security-mlogc","fixed_in":["2.9.6-2.el9_6"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"mod_security","fixed_in":["2.9.6-2.el8_10"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"mod_security-mlogc","fixed_in":["2.9.6-2.el8_10"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"modsecurity","fixed_in":["3.0.12"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"modsecurity2","fixed_in":["2.9.9"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"mod_security","fixed_in":["2.9.6-1.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"TuxCare:AlmaLinux:9.2","package":"mod_security-mlogc","fixed_in":["2.9.6-1.el9.tuxcare.els1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"modsecurity-apache","fixed_in":["2.9.7-1+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"modsecurity-apache","fixed_in":["2.9.9-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"modsecurity-apache","fixed_in":["2.9.9-1"],"sources":["osv"]},{"ecosystem":"Debian:11","package":"modsecurity-apache","fixed_in":["2.9.3-3+deb11u3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS","package":"mod_security","fixed_in":["2.9.9-1.oe2403"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"mod_security","fixed_in":["2.9.9-1.oe2403sp1"],"sources":["osv"]},{"ecosystem":"Red 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Has Possible DoS Vulnerability","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:08:31.982Z","modified":"2025-05-22T15:51:50.75Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1050"],"updated_at":"2026-11-02T14:32:25.982948Z"}],"euvd":[{"id":"EUVD-2025-16086","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:08:31Z","modified":"2025-05-22T15:51:50Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:40.249574Z"}],"nvd":[{"id":"CVE-2025-47947","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:15:50.963Z","modified":"2026-06-17T09:28:52.993Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1050"],"updated_at":"2026-11-02T14:11:09.562272Z"}],"osv":[{"id":"CVE-2025-47947","title":"ModSecurity Has Possible DoS Vulnerability","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:08:31.982Z","modified":"2026-10-28T02:31:13.949534647Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1050"],"updated_at":"2026-11-02T15:44:50.037003Z"},{"id":"DEBIAN-CVE-2025-47947","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:15:50.963Z","modified":"2026-09-01T20:05:53.022594269Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:47.378563Z"},{"id":"OESA-2025-1559","title":"mod_security security update","description":"This software is also called Modsec,it is an open-source web application firewall. It is designed for Apache HTTP Server.ModSecurity is commonly deployed to provide protections against generic classed of vulnerabilities.The install of this package is easy and you can read the README.TXT for more information.\r\n\r\nSecurity Fix(es):\n\nThe OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected by the web application firewall engine and the rule set. The multipart payload will therefore bypass detection. A vulnerable backend that supports these encoding schemes can potentially be exploited. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised upgrade to 3.2.2 and 3.3.3 respectively. The mitigation against these vulnerabilities depends on the installation of the latest ModSecurity version (v2.9.6 / v3.0.8).(CVE-2022-39956)\n\nModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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\u0026apos;s content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.(CVE-2025-47947)","status":"published","published":"2025-05-30T11:08:39Z","modified":"2026-08-18T01:17:59.034211148Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1560","title":"mod_security security update","description":"This software is also called Modsec,it is an open-source web application firewall. It is designed for Apache HTTP Server.ModSecurity is commonly deployed to provide protections against generic classed of vulnerabilities.The install of this package is easy and you can read the README.TXT for more information.\r\n\r\nSecurity Fix(es):\n\nThe OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected by the web application firewall engine and the rule set. The multipart payload will therefore bypass detection. A vulnerable backend that supports these encoding schemes can potentially be exploited. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised upgrade to 3.2.2 and 3.3.3 respectively. The mitigation against these vulnerabilities depends on the installation of the latest ModSecurity version (v2.9.6 / v3.0.8).(CVE-2022-39956)\n\nModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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\u0026apos;s content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.(CVE-2025-47947)","status":"published","published":"2025-05-30T11:08:39Z","modified":"2026-08-18T01:17:58.295180025Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1561","title":"mod_security security update","description":"This software is also called Modsec,it is an open-source web application firewall. It is designed for Apache HTTP Server.ModSecurity is commonly deployed to provide protections against generic classed of vulnerabilities.The install of this package is easy and you can read the README.TXT for more information.\r\n\r\nSecurity Fix(es):\n\nThe OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected by the web application firewall engine and the rule set. The multipart payload will therefore bypass detection. A vulnerable backend that supports these encoding schemes can potentially be exploited. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised upgrade to 3.2.2 and 3.3.3 respectively. The mitigation against these vulnerabilities depends on the installation of the latest ModSecurity version (v2.9.6 / v3.0.8).(CVE-2022-39956)\n\nModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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\u0026apos;s content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.(CVE-2025-47947)","status":"published","published":"2025-05-30T11:08:39Z","modified":"2026-08-18T01:17:58.817163107Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1562","title":"mod_security security update","description":"This software is also called Modsec,it is an open-source web application firewall. It is designed for Apache HTTP Server.ModSecurity is commonly deployed to provide protections against generic classed of vulnerabilities.The install of this package is easy and you can read the README.TXT for more information.\r\n\r\nSecurity Fix(es):\n\nModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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\u0026apos;s content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.(CVE-2025-47947)","status":"published","published":"2025-05-30T11:08:39Z","modified":"2026-08-18T01:17:59.236946907Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1563","title":"mod_security security update","description":"This software is also called Modsec,it is an open-source web application firewall. It is designed for Apache HTTP Server.ModSecurity is commonly deployed to provide protections against generic classed of vulnerabilities.The install of this package is easy and you can read the README.TXT for more information.\r\n\r\nSecurity Fix(es):\n\nModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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\u0026apos;s content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.(CVE-2025-47947)","status":"published","published":"2025-05-30T11:08:39Z","modified":"2026-08-18T01:17:59.389474548Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"RHSA-2025:13680","title":"Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update","status":"published","published":"2025-08-15T10:04:27Z","modified":"2026-10-17T10:04:55Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:15.599955Z"},{"id":"RHSA-2025:8605","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-06T10:02:55Z","modified":"2026-10-06T10:03:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8626","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-09T10:02:18Z","modified":"2026-10-06T10:03:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8627","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-09T10:02:18Z","modified":"2026-10-06T10:03:50Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8674","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-10T10:02:59Z","modified":"2026-10-06T10:03:50Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8837","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-12T10:03:00Z","modified":"2026-10-06T10:03:51Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8844","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-12T10:03:01Z","modified":"2026-10-06T10:03:51Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8917","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-12T10:03:03Z","modified":"2026-10-06T10:03:52Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8922","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-12T10:03:04Z","modified":"2026-10-06T10:03:52Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RHSA-2025:8937","title":"Red Hat Security Advisory: mod_security security update","status":"published","published":"2025-06-12T10:03:05Z","modified":"2026-10-06T10:03:53Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:17.634515Z"},{"id":"RLSA-2025:8837","title":"Important: mod_security security update","description":"ModSecurity is an open source intrusion detection and prevention engine for web applications.\n\nSecurity Fix(es):\n\n* modsecurity: ModSecurity Has Possible DoS Vulnerability (CVE-2025-47947)\n\nFor 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.","status":"published","published":"2025-10-04T00:11:30.91642Z","modified":"2025-10-07T17:39:48.151947Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:25.508922Z"},{"id":"RLSA-2025:8844","title":"Important: mod_security security update","description":"ModSecurity is an open source intrusion detection and prevention engine for web applications.\n\nSecurity Fix(es):\n\n* modsecurity: ModSecurity Has Possible DoS Vulnerability (CVE-2025-47947)\n\nFor 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.","status":"published","published":"2025-07-29T13:38:41.630147Z","modified":"2025-07-29T15:00:12.715812Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:25.508922Z"},{"id":"UBUNTU-CVE-2025-47947","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:15:00Z","modified":"2026-02-04T03:22:45.27143Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:55:50.31802Z"},{"id":"ALSA-2025:8837","title":"Important: mod_security security update","description":"ModSecurity is an open source intrusion detection and prevention engine for web applications.  \n\nSecurity Fix(es):  \n\n  * modsecurity: ModSecurity Has Possible DoS Vulnerability (CVE-2025-47947)\n\n\nFor 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.\n","status":"published","published":"2025-06-11T00:00:00Z","modified":"2026-10-29T11:32:30.02404668Z","updated_at":"2026-11-02T15:27:53.875139Z"},{"id":"ALSA-2025:8844","title":"Important: mod_security security update","description":"ModSecurity is an open source intrusion detection and prevention engine for web applications.  \n\nSecurity Fix(es):  \n\n  * modsecurity: ModSecurity Has Possible DoS Vulnerability (CVE-2025-47947)\n\n\nFor 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.\n","status":"published","published":"2025-06-11T00:00:00Z","modified":"2026-10-29T11:02:23.31201753Z","updated_at":"2026-11-02T15:27:53.875139Z"},{"id":"AZL-62426","title":"CVE-2025-47947 affecting package mod_security 2.9.7-8","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-21T22:15:50Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:21.518778Z"},{"id":"BIT-modsecurity-2025-47947","title":"ModSecurity Has Possible DoS Vulnerability","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-26T07:11:15.892Z","modified":"2026-09-08T08:46:34.704136381Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"BIT-modsecurity2-2025-47947","title":"ModSecurity Has Possible DoS Vulnerability","description":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. 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`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.","status":"published","published":"2025-05-26T07:11:20.691Z","modified":"2026-09-08T08:48:13.952822735Z","updated_at":"2026-11-02T15:28:33.072289Z"},{"id":"CLSA-2025-1762421346","title":"mod_security: Fix of CVE-2025-47947","description":"- CVE-2025-47947: fix potential DoS by adding ARGS to the sanitize list only if\n  it's not added yet","status":"published","published":"2025-11-06T09:29:09Z","modified":"2026-06-01T00:31:15.427104882Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"DLA-4192-1","title":"modsecurity-apache - security update","status":"published","published":"2025-05-29T00:00:00Z","modified":"2026-03-09T01:19:04.596228Z","updated_at":"2026-11-02T15:46:12.7027Z"},{"id":"DSA-5940-1","title":"modsecurity-apache - security update","status":"published","published":"2025-06-08T00:00:00Z","modified":"2026-03-09T02:10:22.608895Z","updated_at":"2026-11-02T15:46:18.296714Z"},{"id":"MGASA-2025-0192","title":"Updated apache-mod_security packages fix security vulnerabilities","description":"ModSecurity Has Possible DoS Vulnerability. (CVE-2025-47947)\nModSecurity has possible DoS vulnerability in sanitiseArg action.\n(CVE-2025-48866)\n","status":"published","published":"2025-06-25T05:31:45Z","modified":"2026-04-16T04:44:33.04743655Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"openSUSE-SU-2025:15197-1","title":"apache2-mod_security2-2.9.10-1.1 on GA media","description":"These are all security issues fixed in the apache2-mod_security2-2.9.10-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-06-03T00:00:00Z","modified":"2026-03-23T04:53:28.904214Z","updated_at":"2026-11-02T16:58:37.399567Z"},{"id":"SUSE-SU-2025:02028-1","title":"Security update for apache2-mod_security2","description":"This update for apache2-mod_security2 fixes the following issues:\n\n- CVE-2025-47947: Fixed denial of service through sanitiseMatchedBytes (bsc#1243978).\n- CVE-2025-48866: Fixed denial of service via excessive number of arguments in sanitiseArg (bsc#1243976).\n","status":"published","published":"2025-06-19T15:16:46Z","modified":"2026-02-04T03:23:27.348017Z","updated_at":"2026-11-02T15:53:56.647031Z"},{"id":"SUSE-SU-2025:02029-1","title":"Security update for apache2-mod_security2","description":"This update for apache2-mod_security2 fixes the following issues:\n\n- CVE-2025-47947: Fixed denial of service through sanitiseMatchedBytes (bsc#1243978).\n- CVE-2025-48866: Fixed denial of service via excessive number of arguments in sanitiseArg (bsc#1243976).\n","status":"published","published":"2025-06-19T15:17:27Z","modified":"2025-06-20T12:59:21.60219Z","updated_at":"2026-11-02T15:53:56.647031Z"},{"id":"SUSE-SU-2025:02052-1","title":"Security update for apache2-mod_security2","description":"This update for apache2-mod_security2 fixes the following issues:\n\n- CVE-2025-47947: Fixed denial of service through sanitiseMatchedBytes (bsc#1243978).\n- CVE-2025-48866: Fixed denial of service via excessive number of arguments in sanitiseArg (bsc#1243976).\n","status":"published","published":"2025-06-20T13:04:57Z","modified":"2026-02-04T03:07:30.212216Z","updated_at":"2026-11-02T15:53:56.647031Z"},{"id":"USN-7567-1","title":"modsecurity-apache vulnerabilities","description":"Simon Studer discovered that ModSecurity incorrectly handled certain\nJSON objects. An attacker could possibly use this issue to cause a denial\nof service. (CVE-2025-47947)\n\nIt was discovered that ModSecurity incorrectly handled requests when\nparsing certain form data. An attacker could possibly use this issue to\ncause a denial of service. (CVE-2025-48866)","status":"published","published":"2025-06-13T05:00:45Z","modified":"2026-06-25T13:32:30.424294377Z","updated_at":"2026-11-02T16:58:19.988474Z"}]}}