Insecure Deserialization of .cleanshot Files in CleanShot X
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
CVE-2026-16477
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-16477
CleanShot X
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "MTW",
"product": "CleanShot X",
"versions": [
{
"status": "affected",
"version": "4.0.0",
"lessThan": "4.5.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.6.0",
"lessThan": "4.6.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.7.0",
"lessThan": "4.7.8",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.8.0",
"lessThan": "4.8.10",
"versionType": "semver"
}
],
"platforms": [
"MacOS"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-16477
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #52355 · Revision 1
- Added to Heist Feed
- Publisher date