CVE-2026-33555 (GCVE-0-2026-33555)
Vulnerability from cvelistv5
Published
2026-04-13 00:00
Modified
2026-04-14 13:22
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
Summary
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.
Impacted products
Vendor Product Version
HAProxy HAProxy Version: 2.6   < 3.3.6
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Show details on NVD website


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