{"schema":"threatline.record/2","record":{"id":"CVE-2026-16477","aliases":[],"summary":"Insecure Deserialization of .cleanshot Files in CleanShot X","details":"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: 4.5.2, 4.6.3, 4.7.8 and 4.8.10","categories":["Unclassified"],"product":"CleanShot X","vendor":"MTW","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-16477","source_modified_at":"2026-10-22T19:00:31.571Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"CleanShot X","vendor":"MTW","versions":[{"status":"affected","version":"4.0.0","lessThan":"4.5.2","versionType":"semver"},{"status":"affected","version":"4.6.0","lessThan":"4.6.3","versionType":"semver"},{"status":"affected","version":"4.7.0","lessThan":"4.7.8","versionType":"semver"},{"status":"affected","version":"4.8.0","lessThan":"4.8.10","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-16477","source_modified_at":"2026-10-22T19:00:31.571Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"CleanShot X","ecosystem":null},"version":"4.5.2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-16477","source_modified_at":"2026-10-22T19:00:31.571Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"CleanShot X","ecosystem":null},"version":"4.6.3","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-16477","source_modified_at":"2026-10-22T19:00:31.571Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"CleanShot X","ecosystem":null},"version":"4.7.8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-16477","source_modified_at":"2026-10-22T19:00:31.571Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"CleanShot X","ecosystem":null},"version":"4.8.10","basis":"first unaffected version stated in the CVE record"}],"cvss":8.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00287,"percentile":0.202,"score_date":"2026-10-23"},"published_at":"2026-10-22T14:47:26.652Z","modified_at":"2026-10-22T19:00:31.571Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-16477","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T19:00:31.571Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-16477","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://cert.pl/en/posts/2026/10/CVE-2026-16477","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://cleanshot.com/","tags":["product"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-22T15:23:03.708342Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-22T19:00:31.571Z","content_hash":"4d93916d0c1a33581bed85b65fdbf5e201637f363dafb93bda246a1eb2e0527b"}}