CVE-2025-49630 - CVE House

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Status published Unknown CVE-2025-49630

Apache HTTP Server: mod_proxy_http2 denial of service

0 CVSS

Vulnerability 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".

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Anthony CORSIEZ

References

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

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Affected Vendor

Apache Software Foundation

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Affected Software

Apache HTTP Server

Vulnerable Versions:

2.4.26

Timeline

Official Publish: July 10th, 2025

Last Modified: November 4th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service

T1190 Exploit Public-Facing Application

T1059 Command and Scripting Interpreter

T1562 Impair Defenses

Defense Evasion

T1485 Data Destruction