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CVE-2026-63718 is an HTTP response-smuggling vulnerability in Apache HTTP Server's mod_proxy_uwsgi module affecting versions 2.4.30 through 2.4.68. A crafted uWSGI backend response containing a Transfer-Encoding header can cause inconsistent interpretation of response boundaries. A malicious backend can exploit this parsing confusion to inject content into subsequent responses delivered to other clients.
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No public exploit code observed for this vulnerability.
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An HTTP request/response smuggling vulnerability in Apache HTTP Server. The advisory lists versions 2.4.0 through versions before 2.4.69 as affected and recommends upgrading to 2.4.69 or later.
Unknown
A response-smuggling vulnerability in Apache HTTP Server's mod_proxy_uwsgi module. A malicious upstream application-server response containing a crafted Transfer-Encoding header can disrupt response-boundary handling. Apache HTTP Server versions 2.4.30 through 2.4.68 are affected; version 2.4.69 contains the fix.
An HTTP response-smuggling or response-injection flaw in Apache mod_proxy_uwsgi affecting versions 2.4.30 through 2.4.68.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.