CVE-2026-59096
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.
INFO
Published Date :
July 2, 2026, 8:17 p.m.
Last Modified :
Oct. 25, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Configure the "oidc-allowed-hosts" setting.
- Validate incoming Host headers.
- Apply vendor security updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59096.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59096 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59096
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59096 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59096 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: Dapr - OIDC Discovery Issuer y JWKS URI Injection via Unvalidated X-Forwarded-Host, Description: El endpoint de descubrimiento OIDC de Dapr Sentry deriva el emisor y la jwks_uri del documento /.well-known/openid-configuration del Host de la solicitud, respetando un encabezado X-Forwarded-Host controlado por el atacante sin validación cuando no hay una lista de allowed-hosts configurada (el valor predeterminado), y sirve el documento con una vida útil de caché pública de una hora. Un atacante remoto no autenticado puede envenenar el documento de descubrimiento de modo que las partes confiables que realizan un descubrimiento dinámico (no fijado) obtengan el JWKS de un servidor controlado por el atacante, lo que hace que se acepten los JWT firmados por el atacante. La explotación requiere que el servidor OIDC esté habilitado sin un jwt-issuer o oidc-allowed-hosts configurado. -
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/dapr/dapr', 'vendor': 'dapr', 'product': 'dapr', 'versions': [{'status': 'affected', 'version': '1.17.0', 'versionType': 'semver'}, {'status': 'affected', 'version': '1.18.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] [{'repo': 'https://github.com/dapr/dapr', 'vendor': 'dapr', 'product': 'dapr', 'versions': [{'status': 'affected', 'version': '1.17.0', 'versionType': 'semver'}, {'status': 'affected', 'version': '1.18.0', 'versionType': 'semver'}], 'packageURL': 'pkg:github/dapr/dapr', 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 06, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-59096', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-06T13:31:18.653745Z'} -
New CVE Received by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/dapr/dapr', 'vendor': 'dapr', 'product': 'dapr', 'versions': [{'status': 'affected', 'version': '1.17.0', 'versionType': 'semver'}, {'status': 'affected', 'version': '1.18.0', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Added CWE CWE-346 Added Reference https://github.com/dapr/dapr/pull/10027 Added Reference https://github.com/dapr/dapr/pull/10028 Added Reference https://github.com/dapr/dapr/pull/10029 Added Reference https://www.vulncheck.com/advisories/dapr-oidc-discovery-issuer-and-jwks-uri-injection-via-unvalidated-x-forwarded-host