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CVE-2026-42533

🗓️ 15 Jul 2026 14:33:45Reported by f5Type 
cve
 cve
🔗 web.nvd.nist.gov📰️ 15 Media mentions👁 395 Views

NGINX map directive regex can cause heap overflow, DoS, or code execution via crafted requests.

Related
Detection
Affected
Refs
Social
NVD
Vulners
Node
OR
f5nginx_gateway_fabricRange1.3.01.6.2
f5nginx_gateway_fabricRange2.0.02.6.7
f5nginx_ingress_controllerRange3.5.03.7.2continuous_releases
f5nginx_ingress_controllerRange5.0.05.5.3continuous_releases
f5nginx_ingress_controllerRange2026-lts-r12026-lts-r4long-term_support
f5nginx_ingress_controllerMatch4.0.0continuous_releases
f5nginx_ingress_controllerMatch4.0.1continuous_releases
f5nginx_plusRange37.0.0.137.0.3.1
f5nginx_plusRanger33r36
f5nginx_plusMatchr36-
f5nginx_plusMatchr36p1
f5nginx_plusMatchr36p2
f5nginx_plusMatchr36p3
f5nginx_plusMatchr36p4
f5nginx_plusMatchr36p5
f5nginx_plusMatchr36p6
f5wafRange4.11.04.16.0nginx
f5wafRange5.2.05.8.0nginx
f5wafRange5.9.05.13.4nginx
[
  {
    "vendor": "F5",
    "product": "NGINX Plus",
    "modules": [
      "map directive with regex matching"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "37.0.0.1",
        "lessThan": "37.0.3.1",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R36",
        "lessThan": "R36 P7",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "R33",
        "lessThan": "*",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "F5",
    "product": "NGINX Open Source",
    "modules": [
      "map directive with regex matching"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "1.31.2",
        "lessThan": "1.31.3",
        "versionType": "custom"
      },
      {
        "status": "affected",
        "version": "0.9.6",
        "lessThan": "1.30.4",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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10 Aug 2026 15:28Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.18.1
CVSS 49.2
EPSS0.04059
SSVC
395