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{"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"}