Server-Side Request Forgery (SSRF) in Istio - CVE-2026-41413
Published: April 20, 2026
Vulnerability identifier: #VU126613
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-41413
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Istio
Affected software:
Istio
Istio
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in RequestAuthentication jwksUri handling when processing a RequestAuthentication resource with a jwksUri pointing to an internal service. A remote user can create a crafted RequestAuthentication resource to disclose sensitive information.
Istiod makes an unauthenticated HTTP GET request to the specified URL without filtering localhost or link-local IP addresses, and the retrieved data can be distributed to Envoy proxies via xDS configuration.
How to mitigate CVE-2026-41413
Install security update from vendor's website.