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EUVD-2026-37905

🗓️ 18 Jun 2026 16:05:20Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 3 Views

HAProxy up to 3.4.0 overflows fcgi_conn drl, causing FastCGI header misparse and routing errors.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-55203
18 Jun 202616:05
attackerkb
CVE
CVE-2026-55203
18 Jun 202616:05
cve
Cvelist
CVE-2026-55203 HAProxy - Integer Overflow in FCGI Demux Record Length Field
18 Jun 202616:05
cvelist
NVD
CVE-2026-55203
18 Jun 202617:16
nvd
Positive Technologies
PT-2026-50707
18 Jun 202600:00
ptsecurity
[
  {
    "enisaIdVendor": [
      {
        "id": "9e005851-aa26-3762-bc12-adea865cc010",
        "vendor": {
          "name": "HAProxy"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "289d22f8-49b7-3d77-a570-2e7cf9311659",
        "product": {
          "name": "haproxy",
          "vendor": {
            "name": "HAProxy"
          }
        },
        "product_version": "0 ≤3.4.0"
      }
    ]
  }
]

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18 Jun 2026 16:05Current
5.6Medium risk
Vulners AI Score5.6
CVSS 49
CVSS 3.17.5
3