{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86137", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "state": "PUBLISHED", "assignerShortName": "mitre", "dateReserved": "2026-09-05T04:19:30.345Z", "datePublished": "2026-09-05T04:19:30.745Z", "dateUpdated": "2026-09-05T04:19:30.745Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "libxml2", "vendor": "xmlsoft", "versions": [{"lessThan": "2.15.4", "status": "affected", "version": "0", "versionType": "semver"}]}], "descriptions": [{"lang": "en", "value": "In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.9, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-09-05T04:19:30.745Z"}, "references": [{"url": "https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4"}, {"url": "https://github.com/GNOME/libxml2/commit/76fe08d97de88bfaef2f7d5cd27f11954cc5bee2"}, {"url": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099"}], "x_generator": {"engine": "CVE-Request-form 0.0.1"}, "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.15.4"}]}]}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "libxml2", "vendor": "xmlsoft", "versions": [{"lessThan": "2.15.4", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp."}], "id": "CVE-2026-86137", "lastModified": "2026-09-08T21:14:09.040", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 2.9, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.4, "impactScore": 1.4, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-09-05T05:17:11.490", "references": [{"source": "cve@mitre.org", "url": "https://github.com/GNOME/libxml2/commit/76fe08d97de88bfaef2f7d5cd27f11954cc5bee2"}, {"source": "cve@mitre.org", "url": "https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4"}, {"source": "cve@mitre.org", "url": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "cve@mitre.org", "type": "Primary"}]}

{"bugzilla": {"description": "libxml2: libxml2: Denial of Service via out-of-bounds read in xmlFAParsePosCharGroup", "id": "2528985", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528985"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.9", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in libxml2. This out-of-bounds read vulnerability, specifically within the `xmlFAParsePosCharGroup` function, could allow an attacker to cause a denial of service. By processing specially crafted XML input, the affected component may attempt to read data beyond its allocated memory buffer, leading to application instability or crashes."], "name": "CVE-2026-86137", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "libxml2", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "swift-lang", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-05T04:19:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-86137\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-86137\nhttps://github.com/GNOME/libxml2/commit/76fe08d97de88bfaef2f7d5cd27f11954cc5bee2\nhttps://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4\nhttps://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.15.4)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "libxml2", "source": "cna", "vendor": "xmlsoft"}, "product": "libxml2", "vendor": "xmlsoft"}], "created": "2026-09-05T05:30:17.527773+00:00", "title": "Out-of-Bounds Read in libxml2's xmlFAParsePosCharGroup", "updated": "2026-09-05T06:00:12.306478+00:00", "vendors": ["xmlsoft", "xmlsoft$PRODUCT$libxml2"]}