CVE-2026-56449

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{"affected_release": [{"advisory": "RHSA-2026:74858", "cpe": "cpe:/a:redhat:hummingbird:1", "package": "httpd-main-2.4.69-1.hum1", "product_name": "Red Hat Hardened Images", "release_date": "2026-10-02T00:00:00Z"}], "bugzilla": {"description": "httpd: httpd: Denial of Service via crafted HTTP response bodies in mod_proxy_html", "id": "2544778", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544778"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "verified"}, "cwe": "CWE-787", "details": ["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": {"lang": "en:us", "value": "Disable the `mod_proxy_html` module if HTML link rewriting is not required:\n1. Comment out the module loader directive in `/etc/httpd/conf.modules.d/00-proxyhtml.conf`:\n```\n# sed -i 's/^\\s*LoadModule proxy_html_module/#&/' /etc/httpd/conf.modules.d/00-proxyhtml.conf\n```\nAlternatively, set `ProxyHTMLEnable Off` in the affected server or virtual host configuration.\n2. Reload the Apache HTTP Server:\n```\n# systemctl reload httpd\n```\nCaveats:\nDisabling `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.\nWarning: Reloading or restarting the `httpd` service may temporarily interrupt active network connections."}, "name": "CVE-2026-56449", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "httpd:2.4/httpd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-01T16:06:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56449\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56449\nhttp://www.openwall.com/lists/oss-security/2026/10/01/18\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "threat_severity": "Low"}

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