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.
Severity (CVSS)
| Base score | 8.2 |
|---|---|
| Severity | High |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-346 — Origin Validation Error
Affected products
| Vendor | Product | Versions |
|---|---|---|
| dapr | dapr | 1.17.0; 1.18.0 |
References
- https://github.com/dapr/dapr/pull/10027 (issue-tracking)
- https://github.com/dapr/dapr/pull/10028 (issue-tracking)
- https://github.com/dapr/dapr/pull/10029 (issue-tracking)
- https://www.vulncheck.com/advisories/dapr-oidc-discovery-issuer-and-jwks-uri-injection-via-unvalidated-x-forwarded-host (third-party-advisory)
Generated from the official CVE List on 03 Jul 2026 07:05 UTC.