DEBIAN-CVE-2026-33555

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Source
https://security-tracker.debian.org/tracker/CVE-2026-33555
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33555.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-33555
Upstream
Published
2026-04-13T17:16:28Z
Modified
2026-09-14T17:03:07Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
Summary
[none]
Details

An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be used for request smuggling. The earliest affected version is 2.6.

References

Affected packages

Debian:12 / haproxy

Package

Name
haproxy
Purl
pkg:deb/debian/haproxy?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.6.12-1
2.6.12-1+deb12u1
2.6.12-1+deb12u2
2.6.12-1+deb12u3
2.6.13-1
2.6.14-1
2.6.15-1
2.7.0-1
2.7.1-1
2.7.2-1
2.7.2-2
2.7.3-1
2.7.4-1
2.7.5-1
2.7.6-1
2.7.7-1
2.7.8-1
2.8.0-1
2.8.1-1
2.8.2-1
2.8.3-1
2.8.4-1
2.8.4-2
2.8.5-1
2.9.0-1
2.9.1-1
2.9.2-1
2.9.3-1
2.9.4-1
2.9.5-1
2.9.6-1
2.9.7-1
2.9.8-1
2.9.9-1
2.9.10-1
2.9.11-1
2.9.12-1
3.*
3.0.0-1
3.0.1-1
3.0.2-1
3.0.3-1
3.0.4-1
3.0.5-1
3.0.6-1
3.0.6-2
3.0.6-3
3.0.7-1
3.0.8-1
3.0.9-1
3.0.10-1
3.0.11-1
3.1.0-1
3.1.0-2
3.1.1-1
3.1.2-1
3.1.3-1
3.1.5-1
3.1.6-1
3.1.7-1
3.2.0-1
3.2.1-1
3.2.3-1
3.2.3-2
3.2.4-1
3.2.5-1
3.2.5-2
3.2.6-1
3.2.7-1
3.2.8-1
3.2.9-1
3.2.10-1
3.2.11-1
3.2.11-2
3.2.12-1
3.2.13-1
3.2.14-1
3.2.15-1
3.2.16-1
3.2.17-1
3.2.18-1
3.2.19-1
3.2.20-1
3.2.21-1
3.2.22-1
3.2.23-1
3.3.0-1
3.3.1-1
3.3.2-1
3.3.2-2
3.3.3-1
3.3.4-1
3.3.5-1
3.3.6-1
3.3.7-1
3.3.8-1
3.3.9-1
3.3.10-1
3.4.0-1
3.4.1-1
3.4.2-1
3.4.3-1
3.4.4-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33555.json"

Debian:13 / haproxy

Package

Name
haproxy
Purl
pkg:deb/debian/haproxy?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.0.11-1+deb13u3

Affected versions

3.*
3.0.11-1
3.0.11-1+deb13u1
3.0.11-1+deb13u2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33555.json"

Debian:14 / haproxy

Package

Name
haproxy
Purl
pkg:deb/debian/haproxy?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.2.15-1

Affected versions

3.*
3.0.11-1
3.1.0-1
3.1.0-2
3.1.1-1
3.1.2-1
3.1.3-1
3.1.5-1
3.1.6-1
3.1.7-1
3.2.0-1
3.2.1-1
3.2.3-1
3.2.3-2
3.2.4-1
3.2.5-1
3.2.5-2
3.2.6-1
3.2.7-1
3.2.8-1
3.2.9-1
3.2.10-1
3.2.11-1
3.2.11-2
3.2.12-1
3.2.13-1
3.2.14-1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33555.json"