CVE-2026-39866 PUBLISHED

Lawnchair vulnerable to Command Injection via unquoted workflow dispatch input in release_update.yml

Assigner: GitHub_M
Reserved: 07.04.2026 Published: 21.04.2026 Updated: 21.04.2026

Lawnchair is a free, open-source home app for Android. Prior to commit fcba413f55dd47f8a3921445252849126c6266b2, command injection in release_update.yml workflow dispatch input allows arbitrary code execution. Commit fcba413f55dd47f8a3921445252849126c6266b2 patches the issue.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CVSS Score: 7.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	LawnchairLauncher
Product	lawnchair
Versions	Version < fcba413f55dd47f8a3921445252849126c6266b2 is affected

References

Problem Types

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection') CWE