CVE-2026-52747
- Source
- https://cve.org/CVERecord?id=CVE-2026-52747
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52747.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-52747
- Aliases
-
- BIT-modsecurity-2026-52747
- GHSA-rcw9-2f5r-7p88
- Downstream
- Published
- 2026-07-10T21:42:11Z
- Modified
- 2026-10-20T12:00:17Z
- 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
- ModSecurity: Multipart form-data parser silently strips embedded line breaks from form-field values, enabling request-body inspection bypass
- 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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-180" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52747.json" }- References
-
- https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52747.json
- https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-rcw9-2f5r-7p88
- https://nvd.nist.gov/vuln/detail/CVE-2026-52747
- https://github.com/owasp-modsecurity/ModSecurity/commit/875504c2758169c41be1ad2f0cc64d896b7815d7
Affected packages
Git / github.com/owasp-modsecurity/modsecurity
Affected ranges
- Type
- GIT
- Repo
- https://github.com/owasp-modsecurity/modsecurity
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*", "range": [ { "introduced": "0" }, { "fixed": "3.0.16" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "875504c2758169c41be1ad2f0cc64d896b7815d7" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v3.0.16", "range": [ { "fixed": "7ea9fefbe0ba409d8733b4d682c8c4c059cd028d" } ], "source": "REFERENCES_TAG" } ] }