CVE-2025-49630

Description

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".

References

https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html

https://httpd.apache.org/security/vulnerabilities_24.html

http://www.openwall.com/lists/oss-security/2025/07/10/7

http://www.openwall.com/lists/oss-security/2025/07/10/2

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS