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CVE-2026-31837

Published: Mar 10, 2026

Modified: Mar 11, 2026

PUBLISHED

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.

Vendor	Product	Versions
istio	istio	affected `>= 1.29.0-alpha.0, < 1.29.1` affected `>= 1.28.0-alpha.0, < 1.28.5` affected `< 1.27.8`

Weaknesses (CWE)

References

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

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