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"cveId": "CVE-2026-16477",
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"state": "PUBLISHED",
"assignerShortName": "CERT-PL",
"dateReserved": "2026-07-21T14:22:56.242Z",
"datePublished": "2026-10-22T14:47:26.652Z",
"dateUpdated": "2026-10-22T19:00:31.571Z"
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"dateUpdated": "2026-10-22T14:47:26.652Z"
},
"title": "Insecure Deserialization of .cleanshot Files in CleanShot X",
"datePublic": "2026-07-21T12:00:00.000Z",
"problemTypes": [
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"descriptions": [
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"lang": "en",
"cweId": "CWE-502",
"description": "CWE-502: Deserialization of Untrusted Data",
"type": "CWE"
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"affected": [
{
"vendor": "MTW",
"product": "CleanShot X",
"platforms": [
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"value": "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",
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}
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"references": [
{
"url": "https://cert.pl/en/posts/2026/10/CVE-2026-16477",
"tags": [
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"url": "https://cleanshot.com/",
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"exploitMaturity": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED",
"version": "4.0",
"baseSeverity": "HIGH",
"baseScore": 8.4,
"vectorString": "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"
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"timestamp": "2026-10-22T15:23:03.708342Z"
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