{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-116723", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-26T20:23:34.016Z", "datePublished": "2026-10-26T21:52:27.469Z", "dateUpdated": "2026-10-26T21:52:27.469Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-26T21:52:27.469Z"}, "datePublic": "2026-10-22T00:00:00.000Z", "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. 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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Stack-based Buffer Overflow", "cweId": "CWE-121", "type": "CWE"}]}], "affected": [{"vendor": "fltk", "product": "fltk", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "custom", "lessThanOrEqual": "1.4.5"}], "packageURL": "pkg:github/fltk/fltk", "repo": "https://github.com/fltk/fltk"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:fltk_project:fltk:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.4.5"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.5, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/fltk/fltk/issues/1632", "tags": ["issue-tracking"], "name": "GitHub Issue #1632"}, {"url": "https://github.com/fltk/fltk", "tags": ["product"]}, {"url": "https://github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1", "tags": ["patch"]}, {"url": "https://github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx#L255-L265", "tags": ["technical-description"]}, {"url": "https://hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflow", "tags": ["third-party-advisory"]}, {"name": "VulnCheck Advisory: FLTK through 1.4.5 Stack Buffer Overflow via Fl_BMP_Image colors_used Field", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/fltk-through-1.4.5-stack-buffer-overflow-via-fl-bmp-image-colors-used-field"}], "credits": [{"lang": "en", "value": "HaiND from the Post and Telecommunication Institute of Technology", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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{"bugzilla": {"description": "fltk: fltk: Arbitrary code execution via crafted BMP image file", "id": "2561441", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2561441"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in FLTK. This vulnerability allows an attacker to achieve arbitrary code execution or cause a Denial of Service (DoS) by convincing a user to open a specially crafted BMP or ICO image file. The issue occurs due to a stack-based buffer overflow when parsing image headers with an oversized color palette field, leading to memory corruption."], "name": "CVE-2026-116723", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "fltk", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "fltk", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "fltk", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-26T21:52:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-116723\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-116723\nhttps://github.com/fltk/fltk\nhttps://github.com/fltk/fltk/blob/release-1.4.5/src/Fl_BMP_Image.cxx#L255-L265\nhttps://github.com/fltk/fltk/commit/3a049d8262dc759cf9737339420e8457e24c0cb1\nhttps://github.com/fltk/fltk/issues/1632\nhttps://hackmd.io/@haindpwn/fltk-bmp-image-stack-heap-overflow\nhttps://www.vulncheck.com/advisories/fltk-through-1.4.5-stack-buffer-overflow-via-fl-bmp-image-colors-used-field"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.4.5]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "inferred", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "fltk", "source": "cna", "vendor": "fltk"}, "product": "fltk", "vendor": "fltk_project"}], "created": "2026-10-27T07:00:20.523209+00:00", "updated": "2026-10-27T08:45:14.317907+00:00", "vendors": ["fltk_project", "fltk_project$PRODUCT$fltk"]}