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CVE-2026-33555

🗓️ 13 Apr 2026 00:00:00Reported by mitreType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 5 Media mentions👁 163 Views

HAProxy before 3.3.6 does not verify body length against content-length on empty-payload stream close, enabling request smuggling.

Related
Detection
Affected
Refs
Social
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-33555
13 Apr 202600:00
–attackerkb
alpinelinux
AlpineLinux
CVE-2026-33555
13 Apr 202600:00
–alpinelinux
bdu_fstec
BDU FSTEC
HTTP/3 Server Data Compromise
9 Oct 202600:00
–bdu_fstec
cbl_mariner
CBLMariner
CVE-2026-33555 affecting package haproxy for versions less than 2.9.11-5
9 May 202603:31
–cbl_mariner
cgr
Chainguard
CVE-2026-33555 vulnerabilities
7 Jul 202614:17
–cgr
circl
Circl
CVE-2026-33555
16 Apr 202620:00
–circl
cnnvd
CNNVD
HAProxy security vulnerabilities
12 Apr 202616:00
–cnnvd
cvelist
Cvelist
CVE-2026-33555
13 Apr 202600:00
–cvelist
debian
Debian
[SECURITY] [DLA 4842-1] haproxy security update
18 Oct 202618:16
–debian
debian
Debian
[SECURITY] [DSA 6291-1] haproxy security update
22 May 202620:18
–debian
Rows per page
NVD
Vulners
CNA
Node
haproxyhaproxyRange2.6.0–3.3.6
[
  {
    "defaultStatus": "unaffected",
    "product": "HAProxy",
    "vendor": "HAProxy",
    "versions": [
      {
        "lessThan": "3.3.6",
        "status": "affected",
        "version": "2.6",
        "versionType": "custom"
      }
    ]
  }
]

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18 Oct 2026 20:16Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.14 - 5.8
EPSS0.00307
SSVC
163