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.
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History

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

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

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

Link: CVE-2026-31837

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-31837

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses