{"id":"CVE-2026-44631","state":"PUBLISHED","title":"Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow","description":"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.","publishedAt":"2026-06-08T15:19:23.570Z","updatedAt":"2026-06-08T22:32:33.325Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache HTTP Server"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache HTTP Server","defaultStatus":"unaffected","versions":[{"version":"2.4.0","status":"affected","lessThanOrEqual":"2.4.67","versionType":"semver"}]}],"references":["https://httpd.apache.org/security/vulnerabilities_24.html","http://www.openwall.com/lists/oss-security/2026/06/08/14"],"weaknesses":["CWE-124"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44631.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44631","state":"PUBLISHED","datePublished":"2026-06-08T15:19:23.570Z","dateUpdated":"2026-06-08T22:32:33.325Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-05-07T12:39:02.065Z"},"containers":{"cna":{"title":"Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow","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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache HTTP Server","defaultStatus":"unaffected","versions":[{"version":"2.4.0","status":"affected","lessThanOrEqual":"2.4.67","versionType":"semver"}]}],"references":[{"url":"https://httpd.apache.org/security/vulnerabilities_24.html","tags":["vendor-advisory"]}],"metrics":[{"other":{"content":{"text":"low"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-124","description":"CWE-124: Buffer Underwrite","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-06-08T15:19:23.570Z"},"credits":[{"lang":"en","type":"finder","value":"Zhenpeng (Leo) Lin at depthfirst"},{"lang":"en","type":"finder","value":"Bartlomiej Dmitruk"}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2026-04-27T12:00:00.000Z","value":"reported"},{"lang":"en","time":"2026-06-05T12:00:00.000Z","value":"fixed in 2.4.x by r1935015"},{"lang":"eng","time":"2026-06-08T12:00:00.000Z","value":"2.4.68 released"}],"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-08T19:43:09.481041Z","id":"CVE-2026-44631","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-08T19:43:13.169Z"}},{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/06/08/14"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-08T22:32:33.325Z"}}]}}}