CVE-2019-8400: Ory Hydra

Medium severity, CVSS 6.1. EPSS: 1.3% chance of exploitation in the next 30 days.

ORY Hydra before v1.0.0-rc.3+oryOS.9 has Reflected XSS via the oauth2/fallbacks/error error_hint parameter.

Affected products

• Ory Hydra: version 0.1 only; version 0.2.0 only; version 0.3.0 only; version 0.3.1 only; version 0.4.0 only; version 0.4.1 only; …

Published 2019-02-17. Last modified 2026-06-17.