Lucene search
K

CVE-2026-55203

🗓️ 18 Jun 2026 16:05:20Reported by VulnCheckType 
cve
 cve
🔗 web.nvd.nist.gov👁 5 Views

HAProxy before 3.4.0 has a fastcgi demux record length overflow that desynchronizes the parser and risks routing or memory safety issues.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-55203
18 Jun 202616:05
attackerkb
Cvelist
CVE-2026-55203 HAProxy - Integer Overflow in FCGI Demux Record Length Field
18 Jun 202616:05
cvelist
EUVD
EUVD-2026-37905
18 Jun 202616:05
euvd
NVD
CVE-2026-55203
18 Jun 202617:16
nvd
Positive Technologies
PT-2026-50707
18 Jun 202600:00
ptsecurity
Vulners
CNA
Node
haproxyhaproxyRange03.4.0
[
  {
    "vendor": "haproxy",
    "product": "haproxy",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "versionType": "semver",
        "lessThanOrEqual": "3.4.0"
      },
      {
        "status": "unaffected",
        "version": "5985276735777634d8c85f1d73bb7764aab0d6dd",
        "versionType": "git"
      }
    ],
    "repo": "https://github.com/haproxy/haproxy"
  }
]

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