Vulnerability · Published May 7, 2026 · Assigned by GitHub_M

CVE-2026-41413Istio Vulnerable to SSRF via RequestAuthentication jwksUri

Medium 5.0

In plain English

A medium-severity server-side request forgery in istio from istio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.3%top 73.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	istio.io/istio	0.0.0-20260410004459-189832a289c1	GHSA-fgw5-hp8f-xfhc
Go	istio.io/istio	0.0.0-20260410004459-189832a289c1	GO-2026-5363

Affected products (as reported)

Vendor	Product	Versions
istio	istio	< 1.28.6>= 1.29.0-alpha.0, < 1.29.2

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

References

https://github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc x_refsource_CONFIRM
https://github.com/istio/istio/releases/tag/1.28.6 x_refsource_MISC
https://github.com/istio/istio/releases/tag/1.29.2 x_refsource_MISC