luci-app-tailscale-community - Command Injection via tailscale.do_login RPC

{
  "id": "f9f7dbdd78929f57a4f955472a5ddfdf490f6b294c062bc4c4c5babe81b4663d",
  "url": "https://osv.dev/vulnerability/CVE-2026-57999",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "luci-app-tailscale-community - Command Injection via tailscale.do_login RPC",
    "summary": "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.",
    "evidence": "osv:CVE-2026-57999",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-57999",
      "aliases": [
        "CVE-2026-57999",
        "GHSA-xwc5-mx58-rh35"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openwrt/luci",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "adc4c2932ec7039a6b7effeace098e5bc46861c6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.11.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.11.1",
            "0.11.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57999.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.751829202Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57999.json",
        "https://github.com/openwrt/luci/security/advisories/GHSA-xwc5-mx58-rh35",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-57999",
        "https://www.vulncheck.com/advisories/luci-app-tailscale-community-command-injection-via-tailscale-do-login-rpc",
        "https://github.com/openwrt/luci"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57999.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-57999",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498787,
  "published_at": "2026-06-29T18:16:04.327+00:00"
}