{"id":"CVE-2026-116723","state":"PUBLISHED","title":"FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field","description":"FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. Attackers can craft BMP or ICO files with colors_used above 256 to overflow the 768-byte colormap array, causing crashes or potential code execution.","publishedAt":"2026-10-26T21:52:27.469Z","updatedAt":"2026-10-26T21:52:27.469Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["fltk fltk"],"affected":[{"vendor":"fltk","product":"fltk","packageURL":"pkg:github/fltk/fltk","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.4.5","versionType":"custom"}],"repo":"https://github.com/fltk/fltk"}],"references":["https://github.com/fltk/fltk/issues/1632","https://github.com/fltk/fltk","https://github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1","https://github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx#L255-L265","https://hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflow","https://www.vulncheck.com/advisories/fltk-through-1.4.5-stack-buffer-overflow-via-fl-bmp-image-colors-used-field"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116723.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116723","state":"PUBLISHED","datePublished":"2026-10-26T21:52:27.469Z","dateUpdated":"2026-10-26T21:52:27.469Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-26T20:23:34.016Z"},"containers":{"cna":{"title":"FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field","descriptions":[{"lang":"en","value":"FLTK through 1.4.5 contains a stack-based buffer overflow vulnerability in Fl_BMP_Image::load_bmp_() that allows attackers to corrupt stack memory by supplying an oversized BMP colors_used field. 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