CVE-2026-31837Istio is an open platform to connect, manage, and secure microservices.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-200, CWE-1392
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 20, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
istio istio istio:istio | before 1.27.8; from 1.28.0 before 1.28.5; from 1.29.0 before 1.29.1 | NVD |
References
- https://github.com/istio/istio/security/advisories/GHSA-v75c-crr9-733cvendor-advisory
- https://access.redhat.com/errata/RHSA-2026:10184
- https://access.redhat.com/errata/RHSA-2026:5948
- https://access.redhat.com/errata/RHSA-2026:5950
- https://access.redhat.com/errata/RHSA-2026:5952
- https://access.redhat.com/security/cve/CVE-2026-31837
- https://bugzilla.redhat.com/show_bug.cgi?id=2446344
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31837.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.