# CVE-2026-41413: GO-2026-5363 - Istio: SSRF via RequestAuthentication jwksUri in istio.io/istio

Source: https://junglewise.ai/threats/cve-2026-41413-istio-ssrf-via-requestauthentication-jwksuri  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-07  
License: CC BY 4.0 with a link back

CVE-2026-41413 · Severity: medium · CVSS 5 · Published 2026-05-07

Istio is an open platform to connect, manage, and secure microservices. Prior to versions 1.28.6 and 1.29.2, when a RequestAuthentication resource is created with a jwksUri pointing to an internal service, istiod makes an unauthenticated HTTP GET request to that URL without filtering out localhost or link local ips. This can result in sensitive data being distributed to Envoy proxies via xDS configuration. This issue has been patched in versions 1.28.6 and 1.29.2.

Technologies: [istio.io/istio (Go)](https://junglewise.ai/threats/technologies/istio-io-istio), [Istio](https://junglewise.ai/threats/technologies/istio). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Istio](https://junglewise.ai/threats/vendors/istio).

## Quick answers

**Is CVE-2026-41413 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41413 being exploited in the wild.

**How severe is CVE-2026-41413?** Medium severity, with a CVSS score of 5, published 7 May 2026.

**Which products and versions are affected?** istio.io/istio (Go) SEMVER:introduced=0,fixed=0.0.0-20260410004459-189832a289c1.

**Is there a fix for CVE-2026-41413?** Yes. istio.io/istio (Go): upgrade to 0.0.0-20260410004459-189832a289c1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-41413?** Check whether you run istio.io/istio (Go) or Istio at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- istio.io/istio (Go): upgrade to 0.0.0-20260410004459-189832a289c1 or later

  ```sh
  go get istio.io/istio@v0.0.0-20260410004459-189832a289c1
  ```


## Affected products

- istio.io/istio (Go) SEMVER:introduced=0,fixed=0.0.0-20260410004459-189832a289c1
- Istio

## Identifiers

- CVE-2026-41413
- GHSA-fgw5-hp8f-xfhc
- GO-2026-5363

## Related threats

- [Istio and Envoy Proxy security vulnerabilities](https://junglewise.ai/threats/gcp-2026-069-6d8e440c)
- [Istio AuthorizationPolicy regex injection in serviceAccounts](https://junglewise.ai/threats/cve-2026-39350-istio-authorizationpolicy-regex-injection-in-serviceaccounts)
- [Istio JWKS resolver failure exposes hardcoded default keys](https://junglewise.ai/threats/cve-2026-31837-istio-jwks-resolver-failure-exposes-hardcoded-default-keys)
- [Ill-formed headers may lead to unexpected behavior in Istio](https://junglewise.ai/threats/cve-2022-31045-ill-formed-headers-may-lead-to-unexpected-behavior-in-istio)
- [Istio vulnerable to denial of service](https://junglewise.ai/threats/cve-2019-18817-istio-vulnerable-to-denial-of-service)