Description
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.
CVSS 4EPSS 0.297%Risk 0.41
View source- Published
- 2026-04-13 17:16:28
- Affected versions
- <3.3.6
- Type
- Core software
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N