CVE-2026-33721

{"id": "CVE-2026-33721", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-03-27T01:16:19.670", "references": [{"url": "https://github.com/MapServer/MapServer/releases/tag/rel-8-6-1", "tags": ["Product", "Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/MapServer/MapServer/security/advisories/GHSA-cv4m-mr84-fgjp", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "MapServer is a system for developing web-based GIS applications. Starting in version 4.2 and prior to version 8.6.1, a heap-buffer-overflow write in MapServer\u2019s SLD (Styled Layer Descriptor) parser lets a remote, unauthenticated attacker crash the MapServer process by sending a crafted SLD with more than 100 Threshold elements inside a ColorMap/Categorize structure (commonly reachable via WMS GetMap with SLD_BODY). Version 8.6.1 patches the issue."}, {"lang": "es", "value": "MapServer es un sistema para desarrollar aplicaciones GIS basadas en web. A partir de la versi\u00f3n 4.2 y antes de la versi\u00f3n 8.6.1, una escritura de desbordamiento de b\u00fafer de pila en el analizador SLD (Styled Layer Descriptor) de MapServer permite a un atacante remoto no autenticado bloquear el proceso de MapServer al enviar un SLD manipulado con m\u00e1s de 100 elementos Threshold dentro de una estructura ColorMap/Categorize (com\u00fanmente accesible a trav\u00e9s de WMS GetMap con SLD_BODY). La versi\u00f3n 8.6.1 corrige el problema."}], "lastModified": "2026-04-01T15:58:41.743", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:osgeo:mapserver:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E1105790-48FD-4133-8056-68A8138CDC66", "versionEndExcluding": "8.6.1", "versionStartIncluding": "4.2.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}