{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42146", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-24T17:15:21.834Z", "datePublished": "2026-05-04T17:53:23.830Z", "dateUpdated": "2026-05-04T17:53:23.830Z"}, "containers": {"cna": {"title": "CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp", "problemTypes": [{"descriptions": [{"cweId": "CWE-789", "lang": "en", "description": "CWE-789: Memory Allocation with Excessive Size Value", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv"}, {"name": "https://github.com/GreycLab/CImg/issues/477", "tags": ["x_refsource_MISC"], "url": "https://github.com/GreycLab/CImg/issues/477"}, {"name": "https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3", "tags": ["x_refsource_MISC"], "url": "https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3"}, {"name": "https://github.com/GreycLab/CImg/releases/tag/v.3.7.5", "tags": ["x_refsource_MISC"], "url": "https://github.com/GreycLab/CImg/releases/tag/v.3.7.5"}], "affected": [{"vendor": "GreycLab", "product": "CImg", "versions": [{"version": "< c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-04T17:53:23.830Z"}, "descriptions": [{"lang": "en", "value": "CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5."}], "source": {"advisory": "GHSA-g54r-qmgx-c6fv", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5."}], "id": "CVE-2026-42146", "lastModified": "2026-05-04T18:16:31.977", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-04T18:16:31.977", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3"}, {"source": "security-advisories@github.com", "url": "https://github.com/GreycLab/CImg/issues/477"}, {"source": "security-advisories@github.com", "url": "https://github.com/GreycLab/CImg/releases/tag/v.3.7.5"}, {"source": "security-advisories@github.com", "url": "https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0,c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "CImg", "source": "cna", "vendor": "GreycLab"}, "product": "cimg", "vendor": "greyclab"}], "created": "2026-05-04T19:43:43.646649+00:00", "updated": "2026-05-04T20:00:07.076141+00:00", "vendors": ["greyclab", "greyclab$PRODUCT$cimg"]}