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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://github.com/istio/istio/security/advisories/GHSA-v75c-crr9-733c
Scores
CVSS v3
7.5
EPSS
0.0028
EPSS Percentile
19.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (3)
istio/istio
< 1.27.8 (2 CPE variants)
istio/istio
>= 1.28.0-alpha.0, < 1.28.5
istio/istio
>= 1.29.0-alpha.0, < 1.29.1
Published
Mar 10, 2026
Tracked Since
Mar 11, 2026