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vuln-cve/data/2026/73xxx/CVE-2026-73856.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-73856",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-08-13T17:44:28.645Z",
"datePublished": "2026-11-05T15:50:09.778Z",
"dateUpdated": "2026-11-09T22:12:13.373Z"
},
"containers": {
"cna": {
"title": "ModSecurity: Response Body Inspection Bypass",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-178",
"lang": "en",
"description": "CWE-178: Improper Handling of Case Sensitivity",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw"
},
{
"name": "https://github.com/owasp-modsecurity/ModSecurity/commit/23ccd9202114f8313df3773f7992782fd9949c98",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/owasp-modsecurity/ModSecurity/commit/23ccd9202114f8313df3773f7992782fd9949c98"
},
{
"name": "https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17"
}
],
"affected": [
{
"vendor": "owasp-modsecurity",
"product": "ModSecurity",
"versions": [
{
"version": ">= 3.0.0, < 3.0.17",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-11-05T15:50:09.778Z"
},
"descriptions": [
{
"lang": "en",
"value": "ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 until 3.0.17, src/transaction.cc compares a response Content-Type value against SecResponseBodyMimeType entries case-sensitively. A mixed-case response media type that is semantically equivalent to a configured lowercase type can therefore be treated as unconfigured, causing ModSecurity to skip RESPONSE_BODY inspection. An unauthenticated requester can then receive response content that a phase 4 rule would otherwise block, including sensitive error or debug data. This issue is fixed in version 3.0.17."
}
],
"source": {
"advisory": "GHSA-vmg8-j66p-vgvw",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-vmg8-j66p-vgvw",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-11-09T22:11:44.794859Z",
"id": "CVE-2026-73856",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-11-09T22:12:13.373Z"
}
}
]
}
}