CVE-2025-49630

CVE Details

Release Date:	2025-07-10
Impact:	Moderate	What is this?

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".

See more information about CVE-2025-49630 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.5
Vector String:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version:	3.1
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 10 (mod_http2)	ELSA-2025-14625	2025-08-26
Oracle Linux version 8 (httpd)	ELSA-2025-15123	2025-09-04
Oracle Linux version 8 (mod_http2)	ELSA-2025-15123	2025-09-04
Oracle Linux version 8 (mod_md)	ELSA-2025-15123	2025-09-04
Oracle Linux version 9 (mod_http2)	ELSA-2025-14983	2025-09-01