CVE-2026-63718

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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: HTTP response smuggling via crafted Transfer-Encoding response in mod_proxy_uwsgi", "id": "2544781", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544781"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-444", "details": ["A flaw was found in the mod_proxy_uwsgi module of Apache HTTP Server. This issue allows HTTP response smuggling when the server processes a crafted uWSGI response containing a Transfer-Encoding header. A remote attacker can exploit this vulnerability to desynchronize HTTP communications, potentially leading to response tampering or cache poisoning for other users."], "mitigation": {"lang": "en:us", "value": "If uWSGI proxy functionality is not required, disable the mod_proxy_uwsgi module:\n1. Edit the Apache proxy module configuration file (typically `/etc/httpd/conf.modules.d/00-proxy.conf`) and comment out the loading directive:\n# LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so\n2. Restart the Apache HTTP Server daemon:\nsystemctl restart httpd\nWarning: 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."}, "name": "CVE-2026-63718", "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": "2026-10-01T16:17:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63718\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63718\nhttp://www.openwall.com/lists/oss-security/2026/10/01/26\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "threat_severity": "Important"}

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