CVE-2026-56449
published 2026-10-01CVE-2026-56449: Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies. This issue affects Apache HTTP Server version…
PriorityP347high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.61%
48.6th percentile
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
This issue affects Apache HTTP Server version 2.4.68.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | http_server | >= 2.4.0 < 2.4.69 | 2.4.69 |
| apache | httpd | — | — |
| apache_software_foundation | apache_http_server | — | — |
| httpd_2.4 | httpd | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vendor_redhat7.5HIGH
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Red Hat
httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html
vendor_redhat·2026-10-01·CVSS 7.5
CVE-2026-56449 [HIGH] CWE-787 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html
httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
A flaw was found in the mod_proxy_html module of Apache HTTP Server. An attacker who controls or manipulates HTTP response bodies processed by the proxy can trigger an out-of-bounds memory write. This issue can cause the server process to crash, resulting in a Denial of Service (DoS).
Mitigation: 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.mod
GHSA
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
ghsa_unreviewed·2026-10-01
CVE-2026-56449 [HIGH] CWE-787 Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-56449 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html [fedora-all]
bugzilla·2026-10-02·CVSS 7.5
CVE-2026-56449 [HIGH] CVE-2026-56449 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html [fedora-all]
CVE-2026-56449 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Bugzilla
CVE-2026-56449 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html
bugzilla·2026-10-01·CVSS 7.5
CVE-2026-56449 [HIGH] CVE-2026-56449 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html
CVE-2026-56449 httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html
Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies.
This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
2026-10-01
Published