vulnerability
Apache HTTPD: Apache HTTP Server: mod_proxy_http2 denial of service (CVE-2025-49630)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Jul 10, 2025 | Jul 18, 2025 | Nov 6, 2025 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Jul 10, 2025
Added
Jul 18, 2025
Modified
Nov 6, 2025
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".
Configurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to "on".
Solution
apache-httpd-upgrade-latest
References
- URL-http://www.openwall.com/lists/oss-security/2025/07/10/2
- URL-http://www.openwall.com/lists/oss-security/2025/07/10/7
- URL-https://httpd.apache.org/security/vulnerabilities_24.html
- URL-https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html
- CVE-2025-49630
- https://attackerkb.com/topics/CVE-2025-49630
- CWE-617
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