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Vulnerability record · CVE-2026-39866 · published 21 April 2026

CVE-2026-39866: Lawnchair command injection vulnerability

Lawnchair · Lawnchair

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.

7.4 CVSS 4.0 High EPSS 3.0% · top 13.3% CWE-77 · Command injection
7.4CVSS 4.0 base score
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/LawnchairLauncher/lawnchair/commit/fcba413f55dd47f8a3921445252849126c6266b2 Patch
https://github.com/LawnchairLauncher/lawnchair/security/advisories/GHSA-9prc-pp2c-3427 ExploitVendor Advisory
https://github.com/LawnchairLauncher/lawnchair/security/advisories/GHSA-9prc-pp2c-3427 ExploitVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-39866), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.