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CVE-2026-63718: CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in Apache Software Foundation Apache HTTP Server

0
High
VulnerabilityCVE-2026-63718cvecve-2026-63718cwe-444
Published: 10/01/2026 (10/01/2026, 16:17:06 UTC)
Source: CVE Database V5
Vendor/Project: Apache Software Foundation
Product: Apache HTTP Server

Description

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') response smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi and a crafted uwsgi response with Transfer-Encoding. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.68.

CVSS v3.1

Score 7.5high

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

Affected software

Apache Software Foundation

Apache HTTP Server

Affected versions
>=2.4.30 <=2.4.68

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/01/2026, 16:47:31 UTC

Technical Analysis

This vulnerability (CWE-444) in Apache HTTP Server arises from inconsistent parsing of HTTP requests and responses, enabling HTTP request/response smuggling attacks. The issue occurs in the mod_proxy_uwsgi module when it processes a specially crafted uwsgi response containing Transfer-Encoding headers. Affected versions include Apache HTTP Server from 2.4.30 through 2.4.68.

Potential Impact

Successful exploitation could allow an attacker to manipulate HTTP requests or responses, potentially bypassing security controls or causing unintended behavior in downstream systems. However, no known exploits are reported in the wild at this time.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor Apache Software Foundation advisories for updates and apply patches once available.

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Technical Details

Data Version
5.2
Assigner Short Name
apache
Date Reserved
2026-07-17T19:48:18.493Z
State
PUBLISHED

Threat ID: 6abe8b02a43b0b3b89c7c755

Added to database: 10/01/2026, 16:32:02 UTC

Last enriched: 10/01/2026, 16:47:31 UTC

Last updated: 10/02/2026, 03:45:56 UTC

Views: 11

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