CVE-2025-49630 – Apache HTTP Server mod_proxy_http2 Denial of Service Vulnerability

The following table lists the changes that have been made to the
CVE-2025-49630 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Jul. 10, 2025

    Action Type Old Value New Value
    Added 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”.

    Added CWE CWE-617
    Added Reference https://httpd.apache.org/security/vulnerabilities_24.html
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