{"id":"CVE-2023-29019","aliases":["EUVD-2023-1192","GHSA-4m3m-ppvx-xgw9"],"status":"published","title":"Session fixation in fastify-passport","description":"@fastify/passport is a port of passport authentication library for the Fastify ecosystem. Applications using `@fastify/passport` in affected versions for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to session fixation attacks from network and same-site attackers. fastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and same-site attackers can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website. As a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session. Users are advised to upgrade. There are no known workarounds for this vulnerability.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00751,"percentile":0.55318,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-384"],"published":"2023-04-21T22:28:55Z","modified":"2026-10-28T02:30:33Z","fixes":[{"ecosystem":"npm","package":"@fastify/passport","fixed_in":["1.1.0","2.3.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@fastify/passport","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0"}]}]},{"source":"ghsa","ecosystem":"npm","package":"@fastify/passport","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.3.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@fastify/passport","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.1.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@fastify/passport","ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0"},{"fixed":"2.3.0"}]}]}],"products":[{"vendor":"fastify","product":"fastify-passport"},{"vendor":"fastify","product":"passport"}],"references":[{"url":"https://github.com/fastify/fastify-passport/security/advisories/GHSA-4m3m-ppvx-xgw9","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/fastify/fastify-passport/commit/43c82c321db58ea3e375dd475de60befbfcf2a11","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"https://owasp.org/www-community/attacks/Session_fixation","tags":["x_refsource_MISC","x_transferred","Technical Description","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-29019","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-4m3m-ppvx-xgw9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/29xxx/CVE-2023-29019.json","tags":["advisory"]},{"url":"https://github.com/fastify/fastify-passport","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-29019","title":"Session fixation in fastify-passport","description":"@fastify/passport is a port of passport authentication library for the Fastify ecosystem. Applications using `@fastify/passport` in affected versions for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to session fixation attacks from network and same-site attackers. fastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and same-site attackers can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website. As a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n","status":"published","published":"2023-04-21T22:28:55.045Z","modified":"2025-02-04T19:38:59.862Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:35:28.643185Z"}],"euvd":[{"id":"EUVD-2023-1192","description":"@fastify/passport is a port of passport authentication library for the Fastify ecosystem. Applications using `@fastify/passport` in affected versions for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to session fixation attacks from network and same-site attackers. fastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and same-site attackers can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website. As a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n","status":"published","published":"2023-04-21T22:28:55Z","modified":"2025-02-04T19:38:59Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T00:04:05.9572Z"}],"ghsa":[{"id":"GHSA-4m3m-ppvx-xgw9","title":"Session fixation in fastify-passport","description":"Applications using `@fastify/passport` for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to [session fixation attacks](https://owasp.org/www-community/attacks/Session_fixation) from network and same-site attackers.\n\n## Details\nfastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and [same-site attackers](https://canitakeyoursubdomain.name/) can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website.\n\n## Fix\nAs a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session.\n\n## Credits\n* Pedro Adão (@pedromigueladao), [Instituto Superior Técnico, University of Lisbon](https://tecnico.ulisboa.pt/)\n* Marco Squarcina (@lavish), [Security \u0026 Privacy Research Unit, TU Wien](https://secpriv.wien/)","status":"published","published":"2023-04-21T22:33:30Z","modified":"2023-11-09T05:00:55Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:37:17.64478Z"}],"nvd":[{"id":"CVE-2023-29019","description":"@fastify/passport is a port of passport authentication library for the Fastify ecosystem. Applications using `@fastify/passport` in affected versions for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to session fixation attacks from network and same-site attackers. fastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and same-site attackers can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website. As a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n","status":"published","published":"2023-04-21T23:15:20.197Z","modified":"2026-06-17T05:49:12.16Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T14:07:56.683259Z"}],"osv":[{"id":"CVE-2023-29019","title":"Session fixation in fastify-passport","description":"@fastify/passport is a port of passport authentication library for the Fastify ecosystem. Applications using `@fastify/passport` in affected versions for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to session fixation attacks from network and same-site attackers. fastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and same-site attackers can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website. As a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n","status":"published","published":"2023-04-21T22:28:55.045Z","modified":"2026-10-28T02:30:33.018275769Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T15:44:31.468318Z"},{"id":"GHSA-4m3m-ppvx-xgw9","title":"Session fixation in fastify-passport","description":"Applications using `@fastify/passport` for user authentication, in combination with `@fastify/session` as the underlying session management mechanism, are vulnerable to [session fixation attacks](https://owasp.org/www-community/attacks/Session_fixation) from network and same-site attackers.\n\n## Details\nfastify applications rely on the `@fastify/passport` library for user authentication. The login and user validation are performed by the `authenticate` function. When executing this function, the `sessionId` is preserved between the pre-login and the authenticated session. Network and [same-site attackers](https://canitakeyoursubdomain.name/) can hijack the victim's session by tossing a valid `sessionId` cookie in the victim's browser and waiting for the victim to log in on the website.\n\n## Fix\nAs a solution, newer versions of `@fastify/passport` regenerate `sessionId` upon login, preventing the attacker-controlled pre-session cookie from being upgraded to an authenticated session.\n\n## Credits\n* Pedro Adão (@pedromigueladao), [Instituto Superior Técnico, University of Lisbon](https://tecnico.ulisboa.pt/)\n* Marco Squarcina (@lavish), [Security \u0026 Privacy Research Unit, TU Wien](https://secpriv.wien/)","status":"published","published":"2023-04-21T22:33:30Z","modified":"2026-09-10T03:49:53.483420028Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-384"],"updated_at":"2026-11-02T15:46:37.148947Z"}]}}