HAProxy 2.2 through 3.1.6, in certain uncommon configurations, has a sample_conv_regsub heap-based buffer overflow because of mishandling of the replacement of multiple short patterns with a longer one.
Exploitability
AV:NAC:HPR:NUI:NScope
S:CImpact
C:NI:NA:H6.8/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:HOther