{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107891", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-10-09T04:31:18.665Z", "datePublished": "2026-11-05T15:16:05.511Z", "dateUpdated": "2026-11-05T16:09:17.753Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "product": "musl", "vendor": "musl -libc", "versions": [{"lessThan": "1.2.7", "status": "affected", "version": "0.5.0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "musl libc before 1.2.7, when an untrusted regular expression is used with regcomp, has multiple integer overflows, possibly leading to incorrect allocation sizes and out-of-bounds heap writes."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-11-05T15:16:05.511Z"}, "references": [{"url": "https://musl.libc.org"}, {"url": "https://www.openwall.com/lists/musl/2026/10/21/1"}, {"url": "https://git.musl-libc.org/cgit/musl/commit/?id=7813e9119eb5fe681b6750b8a033a0490bca0941"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/10/21/18"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-11-05T16:09:17.753Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unknown", "product": "musl", "vendor": "musl -libc", "versions": [{"lessThan": "1.2.7", "status": "affected", "version": "0.5.0", "versionType": "semver"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "musl libc before 1.2.7, when an untrusted regular expression is used with regcomp, has multiple integer overflows, possibly leading to incorrect allocation sizes and out-of-bounds heap writes."}], "id": "CVE-2026-107891", "lastModified": "2026-11-05T17:17:35.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-11-05T16:17:32.150", "references": [{"source": "cve@mitre.org", "url": "https://git.musl-libc.org/cgit/musl/commit/?id=7813e9119eb5fe681b6750b8a033a0490bca0941"}, {"source": "cve@mitre.org", "url": "https://musl.libc.org"}, {"source": "cve@mitre.org", "url": "https://www.openwall.com/lists/musl/2026/10/21/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/21/18"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "cve@mitre.org", "type": "Secondary"}]}

{}

{"created": "2026-11-05T17:00:10.311568+00:00", "title": "Integer Overflows in musl libc's regcomp Leading to Heap Overflows", "updated": "2026-11-05T17:00:10.311582+00:00", "vendors": []}