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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…
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".
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache HTTP Server 2.4 | 2.4.26 → 2.4.63 | No fix stated |
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