Vulnerability · Published Jun 29, 2026 · Assigned by VulnCheck

CVE-2026-57999luci-app-tailscale-community - Command Injection via tailscale.do_login RPC

High 8.8

In plain English

A high-severity OS command injection in luci-app-tailscale-community from openwrt. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.5%top 26.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
openwrt	luci-app-tailscale-community	0 – through 0.11.1

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-xwc5-mx58-rh35) vendor-advisory
VulnCheck Advisory: luci-app-tailscale-community - Command Injection via tailscale.do_login RPC third-party-advisory