SSRF in Istio
CVE-2026-41413
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Istio — versions < 1.28.6, >= 1.29.0-alpha.0, < 1.29.2
Weakness classification (CWE)
References
- github.com/istio/istio/security/advisories/GHSA-fgw5-hp8f-xfhc (Mitigation, Vendor Advisory)
- github.com/istio/istio/releases/tag/1.28.6 (Release Notes)
- github.com/istio/istio/releases/tag/1.29.2 (Release Notes)
Frequently asked questions
- What is CVE-2026-41413?
- CVE-2026-41413 is a medium-severity vulnerability in Istio, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-05-07.
- How severe is CVE-2026-41413?
- Medium severity. CVSS v3 base score is 5.0 out of 10.