{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33721","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-23T17:34:57.559Z","datePublished":"2026-03-27T00:15:00.360Z","dateUpdated":"2026-04-17T17:18:03.353Z"},"containers":{"cna":{"title":"MapServer has heap buffer overflow in SLD `Categorize` Threshold parsing","problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/MapServer/MapServer/security/advisories/GHSA-cv4m-mr84-fgjp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/MapServer/MapServer/security/advisories/GHSA-cv4m-mr84-fgjp"},{"name":"https://github.com/MapServer/MapServer/releases/tag/rel-8-6-1","tags":["x_refsource_MISC"],"url":"https://github.com/MapServer/MapServer/releases/tag/rel-8-6-1"}],"affected":[{"vendor":"MapServer","product":"MapServer","versions":[{"version":">= 4.2, < 8.6.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-27T00:15:00.360Z"},"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."}],"source":{"advisory":"GHSA-cv4m-mr84-fgjp","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-30T11:51:50.279171Z","id":"CVE-2026-33721","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-30T11:52:01.621Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2026/04/msg00017.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-04-17T17:18:03.353Z"}}]}}