1sealsemantic last-mile verification

Research / Finding

JWKS Resolver Failure May Expose Hardcoded Default Keys

F-ISTIO-JWKS-002

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

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Recorded evidence

8.7high
CVE-2026-31837CVEistio/istio

JWKS Resolver Failure May Expose Hardcoded Default Keys

Fixed in: 1.29.1, 1.28.5, 1.27.8

patched
details
Finding IDs
F-ISTIO-JWKS-002
CVE
CVE-2026-31837
GHSA
GHSA-v75c-crr9-733c
Status
patched
Fixed in
1.29.1, 1.28.5, 1.27.8
Recorded credit
reported by 1seal (ISTIO-SECURITY-2026-001)
CVE registry state
PUBLISHED
CVE state checked
Upstream title
JWKS Resolver Failure May Expose Hardcoded Default Keys
Upstream publication
Upstream updated
Metadata fetched
Upstream @1seal credit
@1seal: reporter (accepted)

F-ISTIO-JWKS-002: Verification failures. A hardcoded fallback key changes the signature-verification trust decision. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-ISTIO-JWKS-002

Security area (1seal assessment): Identity. A hardcoded fallback key changes the signature-verification trust decision. Reviewed 24 Sep 2026.

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How this page groups evidence

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