CVE-2026-59096 — Dapr - OIDC Discovery Issuer and JWKS URI Injection via Unvalidated X-Forwarded-Host
Dapr Sentry's OIDC discovery endpoint derives the issuer and jwks_uri of the /.well-known/openid-configuration document from the request Host, honoring an attacker-controlled X-…
Published: 2026-07-02 · CVSS: 8.2 · CVSS 4.0
Dapr Sentry's OIDC discovery endpoint derives the issuer and jwks_uri of the /.well-known/openid-configuration document from the request Host, honoring an attacker-controlled X-Forwarded-Host header without validation when no allowed-hosts list is configured (the default), and serves the document with a one-hour public cache lifetime. A remote unauthenticated attacker can poison the discovery document so relying parties performing dynamic (unpinned) discovery fetch the JWKS from an attacker-controlled server, causing attacker-signed JWTs to be accepted. Exploitation requires the OIDC server enabled without a configured jwt-issuer or oidc-allowed-hosts.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7