CVE-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 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".

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://httpd.apache.org/security/vulnerabilities_24.html	Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/07/10/2
http://www.openwall.com/lists/oss-security/2025/07/10/7
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

History

04 Nov 2025, 22:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2025/07/10/2 - () http://www.openwall.com/lists/oss-security/2025/07/10/7 -

03 Nov 2025, 20:19

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html -

29 Jul 2025, 15:11

Type	Values Removed	Values Added
References	~~() https://httpd.apache.org/security/vulnerabilities_24.html -~~	() https://httpd.apache.org/security/vulnerabilities_24.html - Vendor Advisory
First Time		Apache Apache http Server
CPE		cpe:2.3:a:apache:http_server::::::::

15 Jul 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-07-10 17:15

Updated : 2025-11-04 22:16

NVD link : CVE-2025-49630

Mitre link : CVE-2025-49630

CVE.ORG link : CVE-2025-49630

JSON object : View

Products Affected

apache

http_server

CWE

CWE-617

Reachable Assertion

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