CVE-2025-49630

HIGH EPSS 62.9%
Published Jul 10, 202511mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jul 10, 2025 11mo ago
Last Modified Jun 17, 2026 2w ago

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".

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
62.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-617

Affected Products 1

VendorProductVersionRange
apachehttp_server*≥2.4.26  –  <2.4.64

References 4

  • openwall.com http://www.openwall.com/lists/oss-security/2025/07/10/2
  • openwall.com http://www.openwall.com/lists/oss-security/2025/07/10/7
  • httpd.apache.org https://httpd.apache.org/security/vulnerabilities_24.html
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.