========================================================================== Ubuntu Security Notice USN-8208-1 April 27, 2026
haproxy vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS Summary: HAProxy could be made to expose sensitive information over the network. Software Description: - haproxy: fast and reliable load balancing reverse proxy Details: 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. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 haproxy 3.0.12-0ubuntu0.25.10.4 Ubuntu 24.04 LTS haproxy 2.8.16-0ubuntu0.24.04.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8208-1 CVE-2026-33555 Package Information: https://launchpad.net/ubuntu/+source/haproxy/3.0.12-0ubuntu0.25.10.4 https://launchpad.net/ubuntu/+source/haproxy/2.8.16-0ubuntu0.24.04.2
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