{"id":"CVE-2026-44426","aliases":["GHSA-vwx9-7qcf-gg7f","GO-2026-5680"],"url":"https://o3.security/vulnerability/CVE-2026-44426","summary":"ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses  membership check","details":"ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/namespaces/:tenant returns the full namespace object — including\nthe members list (user IDs, e-mails, roles), settings, and device counts — to any caller authenticated by an API Key, for any tenant, regardless of the API Key's own tenant scope. The handler conditionally skips the membership check when the user ID (X-ID) is absent, which is exactly the case for API Key authentication. This vulnerability is fixed in 0.24.2.","published":"2026-05-13T21:06:06.222Z","modified":"2026-08-12T03:51:22.400228671Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00308,"percentile":0.23217,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/shellhub-io/shellhub","fixedVersion":"0.24.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44426.json"},{"type":"ADVISORY","url":"https://github.com/shellhub-io/shellhub/security/advisories/GHSA-vwx9-7qcf-gg7f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44426"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:22.400228671Z"}}