Loading vulnerability…
CVE-2026-52747 is a request inspection integrity flaw in libmodsecurity affecting OWASP ModSecurity versions prior to 3.0.16. The vulnerability is in the multipart/form-data request body parser, which silently removes embedded line breaks from non-file form-field values before exporting them to ARGS and ARGS_POST. The root cause is a logic error in multipart parsing in which reserved bytes are overwritten rather than the current buffer being appended, causing carriage return and line feed characters embedded in form-field values to be lost during inspection. This creates a parser differential between ModSecurity and backend applications that preserve those line breaks, so the WAF may analyze a normalized value that differs from the value actually processed by the application. As a result, security rules inspecting ARGS or ARGS_POST can fail to detect malicious payloads whose dangerous semantics depend on preserved line breaks.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in ModSecurity's multipart/form-data parser that strips embedded line breaks from non-file form fields before exporting them to ARGS and ARGS_POST, creating a parser differential that can let WAF rules miss malicious payloads dependent on line breaks.
A high-severity vulnerability in libmodsecurity's multipart/form-data parser that strips embedded line breaks from non-file form fields during inspection, enabling request inspection bypass through parser mismatch.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.