{"cve":"CVE-2019-8400","nvd":{"published":"2019-02-17T06:29:00.643","modified":"2026-06-17T02:41:57.283","status":"Modified","description":"ORY Hydra before v1.0.0-rc.3+oryOS.9 has Reflected XSS via the oauth2/fallbacks/error error_hint parameter.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://drive.google.com/file/d/1-25expUYVfK6vsiCmEabUCuelOP7aUDj/view?usp=drivesdk","https://github.com/ory/hydra/blob/master/CHANGELOG.md#v100-rc3oryos9-2018-12-06","https://github.com/ory/hydra/commit/9b5bbd48a72096930af08402c5e07fce7dd770f3","https://hackerone.com/reports/456333","https://www.youtube.com/watch?v=RIyZLeKEC8E"],"products":["ory:hydra"],"source":"nvd","synced_at":"2026-10-19T20:54:46.948512734+00:00"},"epss":{"cve":"CVE-2019-8400","score":0.01328,"percentile":0.71009,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7v6r-w4r6-mhch","url":"https://osv.dev/vulnerability/GHSA-7v6r-w4r6-mhch","summary":"Hydra has Reflected XSS via error_hint parameter","modified":"2026-03-26T21:11:15.549710Z","packages":[{"ecosystem":"Go","name":"github.com/ory/hydra","purl":"pkg:golang/github.com/ory/hydra","ranges":["<1.4.8"],"fixed":["1.4.8"]}]},{"id":"GO-2026-4861","url":"https://osv.dev/vulnerability/GO-2026-4861","summary":"Hydra has Reflected XSS via error_hint parameter in github.com/ory/hydra","modified":"2026-03-26T21:04:11.232859Z","packages":[{"ecosystem":"Go","name":"github.com/ory/hydra","purl":"pkg:golang/github.com/ory/hydra","ranges":["all versions"],"fixed":[]}]}],"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."]}