CVE-2026-41413

Istio Vulnerable to SSRF via RequestAuthentication jwksUri

State: Published
Severity: 5.0 Medium
Published: May 7, 2026
Updated: May 7, 2026
Reserved: Apr 20, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.0 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
istioistio	< 1.28.6Affected >= 1.29.0-alpha.0, < 1.29.2Affected

References

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