High
modsecurity — security advisory
ModSecurity / libModSecurity 3.0.0 to 3.0.11 is affected by a WAF bypass for path-based payloads submitted via specially crafted request URLs. ModSecurity v3 decodes percent-encoded characters present in request URLs before it separates the URL path component from the optional query string component. This results in an impedance mismatch versus RFC compliant back-end applications. The vulnerability hides an attack payload in the path component of the URL from WAF rules inspecting it. A back-end may be vulnerable if it uses the path component of request URLs to construct queries. Integrators and users are advised to upgrade to 3.0.12. The ModSecurity v2 release line is not affected by this vulnerability.
- Products
- modsecurity
- Affected versions
- 3.0.10-1, 3.0.11-1, 3.0.12-1, 3.0.12-1.1build1, 3.0.12-1.1build2, 3.0.13-1, 3.0.14-1, 3.0.14-1build1, 3.0.14-1build2, 3.0.15-1, 3.0.16-1, 3.0.3-1, 3.0.4-1, 3.0.4-1build1, 3.0.4-2, 3.0.6-1
- Fixed versions
- Not specified
- CVEs
- CVE-2024-1019
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:06 UTC · Revision 1
Source evidence
ModSecurity / libModSecurity 3.0.0 to 3.0.11 is affected by a WAF bypass for path-based payloads submitted via specially crafted request URLs. ModSecurity v3 decodes percent-encoded characters present in request URLs before it separates the URL path component from the optional query string component. This results in an impedance mismatch versus RFC compliant back-end applications. The vulnerability hides an attack payload in the path component of the URL from WAF rules inspecting it. A back-end may be vulnerable if it uses the path component of request URLs to construct queries. Integrators and users are advised to upgrade to 3.0.12. The ModSecurity v2 release line is not affected by this vulnerability.
osv:UBUNTU-CVE-2024-1019
modsecurity
Fixed versions: Not specified
modsecurity
Fixed versions: Not specified
modsecurity
Fixed versions: Not specified
modsecurity
Fixed versions: Not specified
modsecurity
Fixed versions: Not specified
modsecurity
Fixed versions: Not specified
Complete source record
{
"id": "8640f0f1b73c3a85a15ea3b31e9218128f518672cd91090a515d019347bd36c7",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2024-1019",
"method": "structured",
"payload": {
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"summary": "ModSecurity / libModSecurity 3.0.0 to 3.0.11 is affected by a WAF bypass for path-based payloads submitted via specially crafted request URLs. ModSecurity v3 decodes percent-encoded characters present in request URLs before it separates the URL path component from the optional query string component. This results in an impedance mismatch versus RFC compliant back-end applications. The vulnerability hides an attack payload in the path component of the URL from WAF rules inspecting it. A back-end may be vulnerable if it uses the path component of request URLs to construct queries. Integrators and users are advised to upgrade to 3.0.12. The ModSecurity v2 release line is not affected by this vulnerability.",
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{
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N"
},
{
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"affected": [
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"modified": "2026-10-17T12:56:28.691891280Z",
"provider": "osv",
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"references": [
"https://ubuntu.com/security/CVE-2024-1019",
"https://owasp.org/www-project-modsecurity/tab_cves#cve-2024-1019-2024-01-30",
"https://www.cve.org/CVERecord?id=CVE-2024-1019"
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},
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"source_id": "core-osv",
"document_id": 355720,
"published_at": "2024-01-30T16:15:00+00:00"
}