CVE-2026-33721

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 mor...

CVE-2026-33721

MapServer (CVE-2026-33721) has a heap-buffer-overflow in the SLD parser triggered by a crafted SLD containing more than 100 Threshold elements in a ColorMap/Categorize structure, exploitable by an unauthenticated remote attacker via WMS GetMap with SLD_BODY. Affects versions up to 4.2 prior to 8....