Summary
Martino Spagnuolo discovered that HAProxy did not check received body
lengths in the HTTP/3 parser. A remote attacker could possibly use this
issue to perform a request smuggling attack and obtain sensitive
information.
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 24.04 LTS 24.04:LTS | haproxy | 2.8.16-0ubuntu0.24.04.2 |
| Ubuntu · 25.10 | haproxy | 3.0.12-0ubuntu0.25.10.4 |
| Ubuntu · 26.04 LTS 26.04:LTS | haproxy | 3.2.9-1ubuntu2.1 |
References
-
report
https://ubuntu.com/security/CVE-2026-33555