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
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MTW | CleanShot X | 4.0.0 – < 4.5.2, 4.6.0 – < 4.6.3, 4.7.0 – < 4.7.8, 4.8.0 – < 4.8.10 | 4.5.2 |
References
- https://cert.pl/en/posts/2026/10/CVE-2026-16477 third-party-advisory
- https://cleanshot.com/ product