Vulnerability in Dapr
CVE-2026-59096
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Dapr — versions 1.17.0, 1.18.0
Weakness classification (CWE)
References
- github.com/dapr/dapr/pull/10027 (issue-tracking)
- github.com/dapr/dapr/pull/10028 (issue-tracking)
- github.com/dapr/dapr/pull/10029 (issue-tracking)
- www.vulncheck.com/advisories/dapr-oidc-discovery-issuer-and-jwks-uri-injection-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-59096?
- CVE-2026-59096 is a high-severity vulnerability in Dapr, classified under Origin Validation Error. CVSS score: 7.5/10. Published 2026-07-02.
- How severe is CVE-2026-59096?
- High severity. CVSS v3 base score is 7.5 out of 10.