{"id":"CVE-2026-59096","state":"PUBLISHED","title":"Dapr - OIDC Discovery Issuer and JWKS URI Injection via Unvalidated X-Forwarded-Host","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.","publishedAt":"2026-07-02T19:41:40.984Z","updatedAt":"2026-07-14T22:03:23.087Z","severity":{"score":8.2,"label":"High","version":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["dapr dapr"],"affected":[{"vendor":"dapr","product":"dapr","packageURL":"pkg:github/dapr/dapr","defaultStatus":"unaffected","versions":[{"version":"1.17.0","status":"affected","versionType":"semver"},{"version":"1.18.0","status":"affected","versionType":"semver"}],"repo":"https://github.com/dapr/dapr"}],"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-injection-via-unvalidated-x-forwarded-host"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59096.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59096","state":"PUBLISHED","datePublished":"2026-07-02T19:41:40.984Z","dateUpdated":"2026-07-14T22:03:23.087Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-02T15:38:18.928Z"},"containers":{"cna":{"title":"Dapr - OIDC Discovery Issuer and JWKS URI Injection via Unvalidated X-Forwarded-Host","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"dapr","product":"dapr","packageURL":"pkg:github/dapr/dapr","defaultStatus":"unaffected","versions":[{"version":"1.17.0","status":"affected","versionType":"semver"},{"version":"1.18.0","status":"affected","versionType":"semver"}],"repo":"https://github.com/dapr/dapr"}],"references":[{"url":"https://github.com/dapr/dapr/pull/10027","name":"Fix PR","tags":["issue-tracking"]},{"url":"https://github.com/dapr/dapr/pull/10028","name":"Backport release-1.17","tags":["issue-tracking"]},{"url":"https://github.com/dapr/dapr/pull/10029","name":"Backport release-1.18","tags":["issue-tracking"]},{"url":"https://www.vulncheck.com/advisories/dapr-oidc-discovery-issuer-and-jwks-uri-injection-via-unvalidated-x-forwarded-host","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","version":"3.1","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.2,"vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"Origin Validation Error","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-07-14T22:03:23.087Z"},"tags":["x_open-source"],"datePublic":"2026-05-27T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:dapr:1.17.0:*:*:*:*:*:*:*"},{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:dapr:1.18.0:*:*:*:*:*:*:*"}]}]}],"credits":[{"lang":"en","value":"George Chen","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T13:31:18.653745Z","id":"CVE-2026-59096","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-06T13:31:26.068Z"}}]}}}