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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: Arbitrary code execution via oversized Host header in mod_vhost_alias", "id": "2544832", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544832"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-787", "details": ["A flaw was found in httpd's mod_vhost_alias module. A remote attacker can exploit a stack-based buffer overflow by sending a crafted HTTP request with an excessively large Host header to a server using specific virtual hosting configurations. This issue can lead to arbitrary code execution or cause a Denial of Service (DoS) by crashing the web server."], "mitigation": {"lang": "en:us", "value": "To mitigate this vulnerability without code modifications, ensure that `LimitRequestFieldSize` remains at or below its default limit of 8190 bytes, or disable the `mod_vhost_alias` module if dynamic virtual hosting is not required.\n1. Ensure `LimitRequestFieldSize` is not configured above 8190 in `/etc/httpd/conf/httpd.conf` or `/etc/httpd/conf.d/`:\n```\nLimitRequestFieldSize 8190\n```\n2. Alternatively, if `mod_vhost_alias` is not needed, disable it by commenting out its loading directive in `/etc/httpd/conf.modules.d/00-base.conf`:\n```\n# LoadModule vhost_alias_module modules/mod_vhost_alias.so\n```\n3. Validate the configuration syntax and reload the service:\n```\napachectl configtest\nsystemctl reload httpd\n```\nCaveats: Restricting `LimitRequestFieldSize` may reject legitimate requests that carry exceptionally large HTTP headers, returning a 400 Bad Request response. Disabling `mod_vhost_alias` prevents the use of dynamic virtual host directives such as `VirtualDocumentRoot`.\nWarning: Reloading or restarting the `httpd` daemon may briefly affect in-flight network connections."}, "name": "CVE-2026-63292", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "httpd:2.4/httpd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-01T16:11:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63292\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63292\nhttp://www.openwall.com/lists/oss-security/2026/10/01/24\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "threat_severity": "Important"}