High [CVE-2026-63718] HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi
This high-severity Red Hat Linux advisory covers CVE-2026-63718; related products: Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6.
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Summary
HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-444. Red Hat lists fixing advisory RHSA-2026:74858 with package httpd-main-2.4.69-1.hum1.
Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 3 more.
Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat package: httpd.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
- httpd-main-2.4.69-1.hum1
- RHSA-2026:74858
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Mitigation checklist
- If uWSGI proxy functionality is not required, disable the mod_proxy_uwsgi module: 1. Edit the Apache proxy module configuration file (typically `/etc/httpd/conf.modules.d/00-proxy.conf`) and comment out the loading directive: # LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so 2. Restart the Apache HTTP Server daemon: systemctl restart httpd Warning: Restarting the httpd service causes an immediate disruption to active client connections. Disabling this module will prevent the server from handling requests routed through the uWSGI protocol.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
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