EUVD Vulnerability Catalog
EUVD-2026-108208
Severity: HIGH
Base Score: 8.4
CVSS Version: 4.0
Vulnerability 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: 4.5.2, 4.6.3, 4.7.8 and 4.8.10
CVSS Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: 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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Attack Vector (AV): Local
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Attack Complexity (AC): Low
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Attack Requirements (AT): None
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Privileges Required (PR): None
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User Interaction (UI): Active
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Vulnerability Confidentiality Impact (VC): High
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Vulnerability Integrity Impact (VI): High
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Vulnerability Availability Impact (VA): High
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Subsequent Confidentiality Impact (SC): Low
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Subsequent Integrity Impact (SI): Low
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Subsequent Availability Impact (SA): Low
Affected Vendors & Systems
Vendor
MTW
References & Advisory Links
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
CERT-PL
EPSS Probability
0
Known Aliases
CVE-2026-16477
GHSA-9gj2-4mhg-73v2
Published On
2026-10-22
Last Updated
2026-10-22