{"cve":"CVE-2020-15222","nvd":{"published":"2020-09-24T17:15:13.117","modified":"2026-06-17T02:56:17.993","status":"Modified","description":"In ORY Fosite (the security first OAuth2 & OpenID Connect framework for Go) before version 0.31.0, when using \"private_key_jwt\" authentication the uniqueness of the `jti` value is not checked. When using client authentication method \"private_key_jwt\", OpenId specification says the following about assertion `jti`: \"A unique identifier for the token, which can be used to prevent reuse of the token. These tokens MUST only be used once, unless conditions for reuse were negotiated between the parties\". Hydra does not seem to check the uniqueness of this `jti` value. This problem is fixed in version 0.31.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-345","CWE-287"],"references":["https://github.com/ory/fosite/commit/0c9e0f6d654913ad57c507dd9a36631e1858a3e9","https://github.com/ory/fosite/security/advisories/GHSA-v3q9-2p3m-7g43","https://openid.net/specs/openid-connect-core-1_0.html#ClientAuthentication","https://github.com/ory/fosite/commit/0c9e0f6d654913ad57c507dd9a36631e1858a3e9","https://github.com/ory/fosite/security/advisories/GHSA-v3q9-2p3m-7g43"],"products":["ory:fosite"],"source":"nvd","synced_at":"2026-10-19T21:09:53.489947993+00:00"},"epss":{"cve":"CVE-2020-15222","score":0.00867,"percentile":0.58739,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-v3q9-2p3m-7g43","url":"https://osv.dev/vulnerability/GHSA-v3q9-2p3m-7g43","summary":"Token reuse in Ory fosite","modified":"2026-07-08T06:29:01.430297048Z","packages":[{"ecosystem":"Go","name":"github.com/ory/fosite","purl":"pkg:golang/github.com/ory/fosite","ranges":["<0.31.0"],"fixed":["0.31.0"]}]},{"id":"GO-2021-0110","url":"https://osv.dev/vulnerability/GO-2021-0110","summary":"Token reuse in github.com/ory/fosite","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/ory/fosite","purl":"pkg:golang/github.com/ory/fosite","ranges":["<0.31.0"],"fixed":["0.31.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}