{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-05T10:35:42.170","vulnerabilities":[{"cve":{"id":"CVE-2026-33721","sourceIdentifier":"security-advisories@github.com","published":"2026-03-27T01:16:19.670","lastModified":"2026-04-17T18:16:31.640","vulnStatus":"Modified","cveTags":[],"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’s 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 versión 4.2 y antes de la versión 8.6.1, una escritura de desbordamiento de búfer 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 más de 100 elementos Threshold dentro de una estructura ColorMap/Categorize (comúnmente accesible a través de WMS GetMap con SLD_BODY). La versión 8.6.1 corrige el problema."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-787"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:osgeo:mapserver:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.0","versionEndExcluding":"8.6.1","matchCriteriaId":"E1105790-48FD-4133-8056-68A8138CDC66"}]}]}],"references":[{"url":"https://github.com/MapServer/MapServer/releases/tag/rel-8-6-1","source":"security-advisories@github.com","tags":["Product","Release Notes"]},{"url":"https://github.com/MapServer/MapServer/security/advisories/GHSA-cv4m-mr84-fgjp","source":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2026/04/msg00017.html","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}