PatchTheCVECVE-2026-16477: CleanShot X for macOS insecurely deserializes untrusted data embedded in a .cleanshot project file (editable s
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Routine
HIGH 8.4
CVE-2026-16477 is a high-severity flaw (CVSS 8.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 untru
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.4 (High) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Active |
| EPSS exploit chance | 0.3% (top 80%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2026-10-22 |
| Last modified | 2026-10-22 |
Publisher (CNA): CERT.PL
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Fedora 46 · wasmedge · FIXED · 0.18.1-1.fc46 · FEDORA-2026-4c27216e39 · source
sudo dnf upgrade --advisory=FEDORA-2026-4c27216e39
Advisories and coverage
Official advisories
- CERT Polska: Vulnerability in MTW CleanShot X software 2026-10-22
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.