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CVE-2026-33555

MEDIUM

4.0

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung4.0

SchweregradMEDIUM

CVSS VektorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

AngriffsvektorNETWORK

KomplexitatHIGH

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht4/13/2026

Zuletzt geandert4/13/2026

Quellenvd

Honeypot-Sichtungen0

Schwachen (CWE)

CWE-130

Referenzen

https://github.com/haproxy/haproxy/commit/05a295441c621089ffa4318daf0dbca2dd756a84(cve@mitre.org)

https://www.haproxy.com/documentation/haproxy-aloha/changelog/(cve@mitre.org)

https://www.haproxy.org(cve@mitre.org)

https://www.mail-archive.com/haproxy@formilux.org/msg46752.html(cve@mitre.org)

IOC Korrelationen

Keine Korrelationen erfasst

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