GHSA-Q8CR-74P8-486P
Vulnerability from github – Published: 2026-07-02 21:32 – Updated: 2026-07-02 21:32Dapr 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": [],
"aliases": [
"CVE-2026-59096"
],
"database_specific": {
"cwe_ids": [
"CWE-346"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-02T20:17:07Z",
"severity": "HIGH"
},
"details": "Dapr Sentry\u0027s 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.",
"id": "GHSA-q8cr-74p8-486p",
"modified": "2026-07-02T21:32:14Z",
"published": "2026-07-02T21:32:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59096"
},
{
"type": "WEB",
"url": "https://github.com/dapr/dapr/pull/10027"
},
{
"type": "WEB",
"url": "https://github.com/dapr/dapr/pull/10028"
},
{
"type": "WEB",
"url": "https://github.com/dapr/dapr/pull/10029"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/dapr-oidc-discovery-issuer-and-jwks-uri-injection-via-unvalidated-x-forwarded-host"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
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