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VULNERABILITIES

CVE-2026-31837 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:10184 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:5948 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:5950 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:5952 redhat-SADP
https://access.redhat.com/security/cve/CVE-2026-31837 redhat-SADP

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-1392Use of Default Credentialsredhat-SADP
CWE-200Exposure of Sensitive Information to an Unauthorized Actor[email protected]

Affected Products

ProductVersions
istio istio
< 1.27.8
>= 1.28.0, < 1.28.5
>= 1.29.0, < 1.29.1

CPE

  • cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-31837
NVD Published Date:
Mar 10, 2026
NVD Last Modified:
Jul 20, 2026
Source:
[email protected]