An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.
| Software | From | Fixed in |
|---|---|---|
| haproxy / haproxy | 2.4.0 | 2.4.3 |
| haproxy / haproxy | 2.3.0 | 2.3.13 |
| haproxy / haproxy | 2.2.0 | 2.2.16 |
| debian / debian_linux | 11.0 | 11.0.x |
| fedoraproject / fedora | 33 | 33.x |
| fedoraproject / fedora | 34 | 34.x |