HIGHCVE-2026-31837Published Modified CNA GitHub_M
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 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.
Metrics
- CVSS v4.0
- 8.7
- Severity
- HIGH
- Fixed in
- —
- Affected Products
- 1
Affected packages
- istio / istio>= 1.29.0-alpha.0, < 1.29.1 · >= 1.28.0-alpha.0, < 1.28.5 · < 1.27.8
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N