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.
History

Wed, 11 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 11 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Istio
Istio istio
Vendors & Products Istio
Istio istio

Tue, 10 Mar 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Title Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
Weaknesses CWE-200
References
Metrics cvssV4_0

{'score': 8.7, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-10T21:57:44.387Z

Updated: 2026-03-11T15:58:29.647Z

Reserved: 2026-03-09T17:41:56.078Z

Link: CVE-2026-31837

cve-icon Vulnrichment

Updated: 2026-03-11T15:53:26.857Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-10T22:16:21.720

Modified: 2026-03-11T13:52:47.683

Link: CVE-2026-31837

cve-icon Redhat

No data.