CVE-2026-31837 — Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
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…
Published: 2026-03-10 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7