CVE-2023-40225

score

<0.1

cvss

7.2

epss

2.1%

published

2023-08-10

kev added

—

first seen

2026-10-21

HAProxy versions up to 2.0.32, 2.1.x, 2.2.x through 2.2.30, 2.3.x, 2.4.x through 2.4.23, 2.5.x, 2.6.x before 2.6.15, 2.7.x before 2.7.10, and 2.8.x before 2.8.2 forward empty Content-Length headers, violating RFC 9110 section 8.6, which may cause an HTTP/1 server behind HAProxy to interpret the payload as an extra request, potentially leading to request misinterpretation or security issues.