CVE-2026-31837: falha de alta gravidade em istio
Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
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21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 8.7epss 0.4%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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Referências
https://access.redhat.com/errata/RHSA-2026:10184https://access.redhat.com/errata/RHSA-2026:5948https://access.redhat.com/errata/RHSA-2026:5950https://access.redhat.com/errata/RHSA-2026:5952https://access.redhat.com/security/cve/CVE-2026-31837https://bugzilla.redhat.com/show_bug.cgi?id=2446344https://github.com/istio/istio/security/advisories/GHSA-v75c-crr9-733chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31837.json