Low [CVE-2026-56449] Denial of Service via crafted HTTP response bodies in mod_proxy_html
This low-severity Red Hat Linux advisory covers CVE-2026-56449; related products: Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6.
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Summary
Denial of Service via crafted HTTP response bodies in mod_proxy_html. Red Hat rates this low (CVSS 3.7).
Weakness: CWE-787. 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
- Disable the `mod_proxy_html` module if HTML link rewriting is not required: 1. Comment out the module loader directive in `/etc/httpd/conf.modules.d/00-proxyhtml.conf`: ``` # sed -i 's/^\s*LoadModule proxy_html_module/#&/' /etc/httpd/conf.modules.d/00-proxyhtml.conf ``` Alternatively, set `ProxyHTMLEnable Off` in the affected server or virtual host configuration. 2. Reload the Apache HTTP Server: ``` # systemctl reload httpd ``` Caveats: Disabling `mod_proxy_html` or turning off `ProxyHTMLEnable` halts automated rewriting of URLs in proxied HTML responses, which may break web applications that depend on backend path translation. Warning: Reloading or restarting the `httpd` service may temporarily interrupt active network connections.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
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