{"id":"AZL-92267","summary":"CVE-2026-52747 affecting package mod_security 2.9.7-8","details":"ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 3.0.16, the multipart/form-data request body parser in libmodsecurity silently removes embedded line breaks from non-file form-field values before exporting them to ARGS and ARGS_POST because src/request_body_processor/multipart.cc overwrites reserved bytes in m_reserve instead of appending the current buffer. This creates a parser differential between ModSecurity and backend applications that preserve line breaks in form fields, allowing rules that inspect ARGS or ARGS_POST to miss payloads whose dangerous syntax depends on a line break. This issue is fixed in version 3.0.16.","modified":"2026-08-30T05:24:52Z","published":"2026-07-10T22:16:42Z","upstream":["CVE-2026-52747"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52747"}],"affected":[{"package":{"name":"mod_security","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/mod_security"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.9.7-8"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-92267.json"}}],"schema_version":"1.9.0"}