{"id":"CVE-2026-47386","aliases":["EUVD-2026-38614","GHSA-8m7c-hf24-5g47"],"status":"published","title":"NocoDB: OAuth Authorization Code Race Condition","description":"NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid (access_token, refresh_token) pair, breaking the single-use guarantee that PKCE relies on. This vulnerability is fixed in 2026.05.1.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00256,"percentile":0.17263,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2026-06-05T16:20:32Z","modified":"2026-11-04T02:47:46Z","fixes":[{"ecosystem":"npm","package":"nocodb","fixed_in":["2026.05.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"nocodb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2026.05.0"},{"fixed":"2026.05.1"}]}]},{"source":"osv","ecosystem":"npm","package":"nocodb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2026.05.1"}]}]}],"products":[{"vendor":"nocodb","product":"nocodb"}],"references":[{"url":"https://github.com/nocodb/nocodb/security/advisories/GHSA-8m7c-hf24-5g47","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/nocodb/nocodb/releases/tag/2026.05.1","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47386","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8m7c-hf24-5g47"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47386.json","tags":["advisory"]},{"url":"https://github.com/nocodb/nocodb","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-47386","title":"NocoDB: OAuth Authorization Code Race Condition","description":"NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid (access_token, refresh_token) pair, breaking the single-use guarantee that PKCE relies on. This vulnerability is fixed in 2026.05.1.","status":"published","published":"2026-06-23T20:12:13.596Z","modified":"2026-06-24T19:17:53.755Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T13:36:40.478484Z"}],"euvd":[{"id":"EUVD-2026-38614","description":"NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid (access_token, refresh_token) pair, breaking the single-use guarantee that PKCE relies on. This vulnerability is fixed in 2026.05.1.","status":"published","published":"2026-06-23T20:12:13Z","modified":"2026-06-24T19:17:53Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:30.242414Z"}],"ghsa":[{"id":"GHSA-8m7c-hf24-5g47","title":"NocoDB: OAuth Authorization Code Race Condition","description":"### Summary\nTwo concurrent token-exchange requests using the same OAuth authorization code could\neach mint a distinct valid `(access_token, refresh_token)` pair, breaking the\nsingle-use guarantee that PKCE relies on.\n\n### Details\nThe token-exchange flow read `is_used` and called `markAsUsed` as an unconditional\nupdate at the end of the path. A new `OAuthAuthorizationCode.claimByCode` method now\nperforms an atomic compare-and-swap (`WHERE code = ? AND is_used = false`) and is\ncalled immediately before `OAuthToken.insert`, after redirect-URI, PKCE, and client\nauthentication have all succeeded. Only the first concurrent caller's `UPDATE` wins;\nthe rest see `invalid_grant: Authorization code has already been used`.\n\n### Impact\nAn attacker who has observed an authorization code and the corresponding PKCE\nverifier (for example through a malicious OAuth-aware client or by racing a real\nexchange) could obtain a long-lived refresh token in addition to the legitimate one.\n\n### Credit\nThis issue was reported by [@eddieran](https://github.com/eddieran).","status":"published","published":"2026-06-05T16:20:32Z","modified":"2026-07-20T21:18:56Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:40:47.245721Z"}],"nvd":[{"id":"CVE-2026-47386","description":"NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid (access_token, refresh_token) pair, breaking the single-use guarantee that PKCE relies on. This vulnerability is fixed in 2026.05.1.","status":"published","published":"2026-06-23T21:17:00.617Z","modified":"2026-06-25T14:21:00.26Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:12:25.288279Z"}],"osv":[{"id":"CVE-2026-47386","title":"NocoDB: OAuth Authorization Code Race Condition","description":"NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, two concurrent token-exchange requests using the same OAuth authorization code could each mint a distinct valid (access_token, refresh_token) pair, breaking the single-use guarantee that PKCE relies on. This vulnerability is fixed in 2026.05.1.","status":"published","published":"2026-06-23T20:12:13.596Z","modified":"2026-11-04T02:47:46.834365672Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-04T02:53:00.786919Z"},{"id":"GHSA-8m7c-hf24-5g47","title":"NocoDB: OAuth Authorization Code Race Condition","description":"### Summary\nTwo concurrent token-exchange requests using the same OAuth authorization code could\neach mint a distinct valid `(access_token, refresh_token)` pair, breaking the\nsingle-use guarantee that PKCE relies on.\n\n### Details\nThe token-exchange flow read `is_used` and called `markAsUsed` as an unconditional\nupdate at the end of the path. A new `OAuthAuthorizationCode.claimByCode` method now\nperforms an atomic compare-and-swap (`WHERE code = ? AND is_used = false`) and is\ncalled immediately before `OAuthToken.insert`, after redirect-URI, PKCE, and client\nauthentication have all succeeded. Only the first concurrent caller's `UPDATE` wins;\nthe rest see `invalid_grant: Authorization code has already been used`.\n\n### Impact\nAn attacker who has observed an authorization code and the corresponding PKCE\nverifier (for example through a malicious OAuth-aware client or by racing a real\nexchange) could obtain a long-lived refresh token in addition to the legitimate one.\n\n### Credit\nThis issue was reported by [@eddieran](https://github.com/eddieran).","status":"published","published":"2026-06-05T16:20:32Z","modified":"2026-07-20T21:30:33.424786522Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:46:42.437513Z"}]}}