CVE-2026-57999 | luci-app-tailscale-community contains a command injection vu… | CVSS 8.8 HIGH

Description

luci-app-tailscale-community contains a command injection vulnerability in the tailscale.do_login RPC method that allows authenticated users to execute arbitrary commands as root. The vulnerability exists because user-controlled loginserver and loginserver_authkey parameters are improperly quoted within a double-quoted shell command, allowing shell substitutions like $() to be evaluated by the outer shell before argument processing.

Metadata

CVE ID: CVE-2026-57999
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-26 17:58 UTC
Published: 2026-06-29 18:16 UTC
Last updated: 2026-06-29 18:16 UTC
Primary CWE: CWE-78
Improper Neutralization of Special Elements used in an OS Co…
Vendor / Product: openwrt / luci
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
openwrt	luci	—	0 ≤ 0.11.1

Weakness (CWE)

CWE	Source	Description
CWE-78	cna	Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

GitHub Security Advisory (GHSA-xwc5-mx58-rh35) https://github.com/openwrt/luci/security/advisories/GHSA-xwc5-mx58-rh35
VulnCheck Advisory: luci-app-tailscale-community - Command Injection via tailscale.do_login RPC https://www.vulncheck.com/advisories/luci-app-tailscale-community-command-injection-via-tailscale-do-login-rpc