CVE-2025-49630
published 2025-07-10CVE-2025-49630: In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.
Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on".
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | http_server | >= 2.4.26 < 2.4.64 | 2.4.64 |
| apache_software_foundation | apache_http_server | 2.4.26 – 2.4.63 | — |
| debian | apache2 | < apache2 2.4.65-1~deb12u1 (bookworm) | apache2 2.4.65-1~deb12u1 (bookworm) |
| msrc | azl3_httpd_2.4.62-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_httpd_2.4.64-1_on_azure_linux_3.0 | — | — |
| msrc | cbl2_httpd_2.4.62-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_httpd_2.4.64-1_on_cbl_mariner_2.0 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH