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CVE-2025-49630

Good to know:

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Date: July 10, 2025

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".

Severity Score

Related Resources (5)

https://httpd.apache.org/security/vulnerabilities_24.html
https://security-tracker.debian.org/tracker/CVE-2025-49630
https://nvd.nist.gov/vuln/detail/CVE-2025-49630
https://security.alpinelinux.org/vuln/CVE-2025-49630
https://www.mend.io/vulnerability-database/CVE-2025-49630

Severity Score

Weakness Type (CWE)

Reachable Assertion

CWE-617

Top Fix

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Upgrade Version

Upgrade to version https://github.com/apache/httpd.git - 2.4.64

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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