Lucene search
+L

CVE-2026-42533

🗓️ 15 Jul 2026 14:33:45Reported by f5Type 
cve
 cve
🔗 web.nvd.nist.gov📰️ 15 Media mentions👁 537 Views🌐 WEB

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

Related
Detection
Affected
Refs
Paths
Social
NVD
Vulners
Node
OR
f5nginx_gateway_fabricRange1.3.0–1.6.2
f5nginx_gateway_fabricRange2.0.0–2.6.7
f5nginx_ingress_controllerRange3.5.0–3.7.2continuous_releases
f5nginx_ingress_controllerRange5.0.0–5.5.3continuous_releases
f5nginx_ingress_controllerRange2026-lts-r1–2026-lts-r4long-term_support
f5nginx_ingress_controllerMatch4.0.0continuous_releases
f5nginx_ingress_controllerMatch4.0.1continuous_releases
f5nginx_plusRange37.0.0.1–37.0.3.1
f5nginx_plusRanger33–r36
f5nginx_plusMatchr36-
f5nginx_plusMatchr36p1
f5nginx_plusMatchr36p2
f5nginx_plusMatchr36p3
f5nginx_plusMatchr36p4
f5nginx_plusMatchr36p5
f5nginx_plusMatchr36p6
f5wafRange4.11.0–4.16.0nginx
f5wafRange5.2.0–5.8.0nginx
f5wafRange5.9.0–5.13.4nginx
[
  {
    "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"
  }
]
ParameterPositionPathDescriptionCWE
$1 (path capture)path/api/(...)Heap buffer overflow in nginx's two-pass string evaluation using a regex-based map and path capture ($1) in /api/... allowing pre-auth RCE.CWE-122

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

10 Aug 2026 15:28Current
7.9High risk
Vulners AI Score7.9
CVSS 3.18.1
CVSS 49.2
EPSS0.00894
SSVC
537