Server-Side Request Forgery (SSRF) Affecting istio-1.27 package, versions <1.27.9-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.33% (25th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-ISTIO127-17707575
  • published30 Jun 2026
  • disclosed7 May 2026

Introduced: 7 May 2026

CVE-2026-41413  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade Chainguard istio-1.27 to version 1.27.9-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream istio-1.27 package and not the istio-1.27 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1