CVE-2026-16477
CleanShot X for macOS insecurely deserializes untrusted data embedded in a .cleanshot project file…
- Risk score
- 54/100
- CVSS
- 8.4 v4.0
- Exploit chance (30 days)
- 0.3%
- Published
- 22 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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, re…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.4 high
References
Original 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
Last activity 22 Oct 2026. Patch Forecast updates every hour.