CVE WatchJul 15, 2026

CVE-2026-31837

Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a user of Istio is impacted if

CVSS

7.5

High

EPSS

0.4%

p30

KEV

—

Exploit Today

0-100

Published: Mar 10, 2026 · Last modified: Jul 15, 2026 · CWE-200 · CWE-1392

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-06-302026-07-16

Technical description

Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a user of Istio is impacted if the JWKS resolver becomes unavailable or the fetch fails, exposing hardcoded defaults regardless of use of the RequestAuthentication resource. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.

Official references

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