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CVE-2026-59096— Dapr - OIDC Discovery Issuer and JWKS URI Injection via Unvalidated X-Forwarded-Host

Quick assessment

Affected
dapr dapr
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Dapr是Dapr组织开源的一个可移植、无服务器、事件驱动的运行时。 Dapr 1.17.0版本和1.18.0版本存在输入验证错误漏洞，该漏洞源于未验证X-Forwarded-Host标头，可能导致远程未经验证的攻击者篡改OIDC发现文档，使依赖方从攻击者控制的服务器获取JWKS，从而接受攻击者签名的JWT。

CVSS 7.5 · High EPSS 0.34% · P25

Affected Version Matrix 2

VendorProduct Version RangeStatus
dapr dapr 1.17.0 affected
1.18.0 affected
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I. Basic Information for CVE-2026-59096

Vulnerability Information
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Vulnerability Title
Dapr - OIDC Discovery Issuer and JWKS URI Injection via Unvalidated X-Forwarded-Host
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Dapr 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Dapr是Dapr组织开源的一个可移植、无服务器、事件驱动的运行时。 Dapr 1.17.0版本和1.18.0版本存在输入验证错误漏洞，该漏洞源于未验证X-Forwarded-Host标头，可能导致远程未经验证的攻击者篡改OIDC发现文档，使依赖方从攻击者控制的服务器获取JWKS，从而接受攻击者签名的JWT。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
dapr dapr 1.17.0 -

II. Public POCs for CVE-2026-59096

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9616 chars
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III. Intelligence Information for CVE-2026-59096

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Patches & Fixes for CVE-2026-59096 (3)

Vendor Advisories for CVE-2026-59096 (1)

IV. Related Vulnerabilities

Same product: dapr
Same vendor: dapr
Same weakness: CWE-346

V. Comments for CVE-2026-59096

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