DEBIAN-CVE-2026-52747
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-52747
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-52747.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-52747
- Upstream
- Published
- 2026-07-10T22:16:42Z
- Modified
- 2026-09-14T17:03:43Z
- Severity
-
- 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
- Summary
- [none]
- 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.
- References
Affected packages
Debian:12 / modsecurity
Package
- Name
- modsecurity
- Purl
- pkg:deb/debian/modsecurity?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / modsecurity
Package
- Name
- modsecurity
- Purl
- pkg:deb/debian/modsecurity?arch=source&distro=trixie
Debian:14 / modsecurity
Package
- Name
- modsecurity
- Purl
- pkg:deb/debian/modsecurity?arch=source&distro=forky