Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/dapr/dapr/pull/10027
- https://github.com/dapr/dapr/pull/10028
- https://github.com/dapr/dapr/pull/10029
- https://www.vulncheck.com/advisories/dapr-oidc-discovery-issuer-and-jwks-uri-inj
FAQ
What is CVE-2026-59096?
CVE-2026-59096 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 w...
How severe is CVE-2026-59096?
CVE-2026-59096 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59096?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.