CVE-2026-31837

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/10/2026

Last Modified3/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

istio:istio

Weaknesses (CWE)

CWE-200

References

https://github.com/istio/istio/security/advisories/GHSA-v75c-crr9-733c(security-advisories@github.com)

IOC Correlations

No correlations recorded

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