CVE-2026-44631

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Apache HTTP Server", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "2.4.67", "status": "affected", "version": "2.4.0", "versionType": "semver"}]}], "source": "security@apache.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "03F07E89-F9BF-4913-8250-F79447AA6EBD", "versionEndExcluding": "2.4.68", "versionStartIncluding": "2.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.\n\nUsers are recommended to upgrade to version 2.4.68, which fixes the issue."}, {"lang": "es", "value": "Vulnerabilidad de escritura insuficiente de b\u00fafer en el Servidor HTTP Apache en expresiones regulares manipuladas en la configuraci\u00f3n.\n\nEste problema afecta al Servidor HTTP Apache: desde 2.4.0 hasta 2.4.67.\n\nSe recomienda a los usuarios actualizar a la versi\u00f3n 2.4.68, la cual corrige el problema."}], "id": "CVE-2026-44631", "lastModified": "2026-07-23T07:10:00.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-44631", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-08T19:43:09.481041Z", "version": "2.0.3"}}]}, "published": "2026-06-08T16:16:40.583", "references": [{"source": "security@apache.org", "tags": ["Vendor Advisory"], "url": "https://httpd.apache.org/security/vulnerabilities_24.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/06/08/14"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-124"}], "source": "security@apache.org", "type": "Secondary"}]}

{"bugzilla": {"description": "httpd: Apache HTTP Server: Denial of Service via crafted regular expressions", "id": "2486399", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486399"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-124", "details": ["Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration.\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.\nUsers are recommended to upgrade to version 2.4.68, which fixes the issue.", "A flaw was found in Apache HTTP Server. This buffer underwrite vulnerability occurs when processing crafted regular expressions in the server's configuration. An attacker could potentially exploit this to cause a denial of service."], "mitigation": {"lang": "en:us", "value": "Only loadtrustedApache configuration; the bug triggers oncrafted regexin config at start/reload (DirectoryMatch,Directory ~,ProxyMatch, etc.).\nKeep AllowOverride None where possible so untrusted users cannot inject regex via .htaccess.\nRestrict who can change httpdconfig and reload the service."}, "name": "CVE-2026-44631", "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", "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"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "httpd", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-06-08T15:19:23Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-44631\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-44631\nhttps://httpd.apache.org/security/vulnerabilities_24.html"], "statement": "Affected httpd versions include vulnerable ap_regname() code. Exploitation requires a crafted regular expression in Apache configuration at parse/reload time. Default RHEL configurations use AllowOverride None, which prevents untrusted .htaccess injection. Remote unauthenticated HTTP clients cannot trigger this flaw. Most likely impact is availability (crash/DoS on reload) rather than demonstrated code execution. Fix: backport SVN r1935015 or upgrade to httpd 2.4.68.", "threat_severity": "Moderate"}

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