CVE-2025-49630— Apache HTTP Server: mod_proxy_http2 denial of service
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I. Basic Information for CVE-2025-49630
Vulnerability Information
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Vulnerability Title
Apache HTTP Server: mod_proxy_http2 denial of service
Source: NVD (National Vulnerability Database)
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".
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
可达断言
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache HTTP Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache HTTP Server是美国阿帕奇（Apache）基金会的一款开源网页服务器。该服务器具有快速、可靠且可通过简单的API进行扩充的特点。 Apache HTTP Server 2.4.26至2.4.63版本存在安全漏洞，该漏洞源于mod_proxy_http2断言失败，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server | 2.4.26 ~ 2.4.63 | - |
II. Public POCs for CVE-2025-49630
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|---|
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Same Patch Batch · Apache Software Foundation · 2025-07-10 · 11 CVEs total
| CVE-2024-42516 | Apache HTTP Server: HTTP response splitting | |
| CVE-2024-43204 | Apache HTTP Server: SSRF with mod_headers setting Content-Type header | |
| CVE-2024-47252 | Apache HTTP Server: mod_ssl error log variable escaping | |
| CVE-2024-43394 | Apache HTTP Server: SSRF on Windows due to UNC paths | |
| CVE-2025-23048 | Apache HTTP Server: mod_ssl access control bypass with session resumption | |
| CVE-2025-49812 | Apache HTTP Server: mod_ssl TLS upgrade attack | |
| CVE-2025-53020 | Apache HTTP Server: HTTP/2 DoS by Memory Increase | |
| CVE-2025-52434 | Apache Tomcat: APR/Native Connector crash leading to DoS | |
| CVE-2025-52520 | Apache Tomcat: DoS via integer overflow in multipart file upload | |
| CVE-2025-53506 | Apache Tomcat: DoS via excessive h2 streams at connection start |
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Apache HTTP Server: http2: double free and possible RCE on e - CVE-2026-33006
Apache HTTP Server: mod_auth_digest timing attack
Same vendor: Apache Software Foundation
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V. Comments for CVE-2025-49630
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