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

> Attackers can poison OIDC discovery documents via X-Forwarded-Host injection, allowing acceptance of forged JWTs and bypassing authentication.

- **Severity:** High 8.2 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 2 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-q8cr-74p8-486p, MINI-2f7p-4qc2-w69j, MINI-8r2q-3vqr-vg9w, MINI-g6p8-27x7-mhvr, MINI-g9x5-gxxj-c8qv, MINI-jf3q-wq68-g3g7, MINI-jvr8-xcvg-5fjm, MINI-p68m-83wj-h8jq, MINI-q9x5-73vg-953h, MINI-rjm4-pvrq-9j4p, MINI-w625-468h-qvxw, MINI-xj64-3g2g-4375, MINI-xmqc-8jhw-3c68

## What is CVE-2026-59096?

CVE-2026-59096 is a high-severity authentication bypass vulnerability in dapr, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-346 (Origin Validation Error)

## Which versions are affected by CVE-2026-59096?


## How do I fix CVE-2026-59096?

Change a configuration setting.

## Is CVE-2026-59096 being exploited?

There is no known exploitation of CVE-2026-59096 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-59096 and fix it if it is affected.

What it is: CVE-2026-59096 is a high-severity authentication bypass vulnerability in dapr, published on 2 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-59096 in the wild and no public exploit code.

Affected product: dapr. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-59096/ (Markdown: https://insights.sbomify.com/CVE-2026-59096/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59096
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59096
- OSV: https://osv.dev/vulnerability/CVE-2026-59096

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-59096/
Summaries are generated and may contain mistakes; the official description above is the record.