{"id":"GHSA-hcf7-66rw-9f5r","summary":"Turbo: Login callback CSRF/session fixation","details":"### Impact\n\nTurborepo's self-hosted login and SSO browser flows did not validate a CSRF state value on the localhost callback. While the CLI was waiting for authentication, a malicious web page could send a request to the local callback server with an attacker-controlled token. If accepted before the legitimate callback, the CLI could complete login with the wrong credentials.\n\nThis affects users authenticating the `turbo` CLI against self-hosted remote cache/auth endpoints. Vercel-hosted login flows using device authorization are not affected.\n\n### Fix\n\nThe login and SSO redirect flows now generate a random state value, include it in the browser authentication URL, and require the same value on the localhost callback before accepting a token. Callbacks with a missing or mismatched state are rejected.\n\n### Workarounds\n\nIf you cannot upgrade immediately, avoid browser-based self-hosted `turbo login` or SSO flows on machines that may load untrusted web content during authentication. Use a pre-provisioned token or environment-based authentication instead.","aliases":["CVE-2026-45773"],"modified":"2026-09-10T03:50:47.005813526Z","published":"2026-05-19T19:49:52Z","database_specific":{"github_reviewed_at":"2026-05-19T19:49:52Z","nvd_published_at":"2026-05-15T16:16:15Z","cwe_ids":["CWE-352"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/vercel/turborepo/security/advisories/GHSA-hcf7-66rw-9f5r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45773"},{"type":"PACKAGE","url":"https://github.com/vercel/turborepo"}],"affected":[{"package":{"name":"turbo","ecosystem":"npm","purl":"pkg:npm/turbo"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.9.14"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 2.9.13","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-hcf7-66rw-9f5r/GHSA-hcf7-66rw-9f5r.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:H/SA:N"}]}