CVE-2026-39866

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

HIGH
8.8
CVSS Score
Published: April 21, 2026 at 01:19 AM UTC
Updated: October 26, 2026 at 12:10 AM UTC
2 products affected across 2 vendorsLawnchairLawnchair

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77

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