{"id":"CVE-2026-16477","revision":null,"records":[{"revision":"d88593026c534db2a186b02b8a43252c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-16477","aliases":[],"title":"Insecure Deserialization of .cleanshot Files in CleanShot X","description":"CleanShot X for macOS insecurely deserializes untrusted data embedded in a .cleanshot project file (editable screenshot annotations). Exploitation requires an attacker to craft a malicious .cleanshot file, deliver it to the target, and have the target open it; the payload then executes automatically during parsing, resulting in arbitrary code execution in the context of the current user. Users who have never opened a .cleanshot file from an untrusted source are not affected by this vulnerability. This vulnerability was fixed in versions:\u00A04.5.2,\u00A04.6.3,\u00A04.7.8 and\u00A04.8.10","state":0,"publishedAt":"2026-10-22T14:47:26.652+00:00","modifiedAt":"2026-10-22T19:00:31.571+00:00","affected":[{"ecosystem":"Vendor product","name":"CleanShot X","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"MTW\",\n                    \"product\": \"CleanShot X\",\n                    \"platforms\": [\n                        \"MacOS\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.0.0\",\n                            \"lessThan\": \"4.5.2\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.6.0\",\n                            \"lessThan\": \"4.6.3\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.7.0\",\n                            \"lessThan\": \"4.7.8\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"4.8.0\",\n                            \"lessThan\": \"4.8.10\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","score":8.4,"severity":"HIGH"}],"references":["https://cert.pl/en/posts/2026/10/CVE-2026-16477","https://cleanshot.com/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-16477","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-16477","identifiers":["CVE-2026-16477"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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