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Threatist priority CRITICAL 0 HIGH 0 MEDIUM 0 LOW 2

Signals Exploited in the wild (KEV) 0 Patch available 2 No fix listed 0 Has CVE 2

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Requirements No authentication 1 No user interaction 2

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Weakness (CWE) CWE-209 Generation of Error Message Containing Sensitive Information 1 CWE-653 Improper Isolation or Compartmentalization 1

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Release: Spring gRPC 1.0.3 × Clear all filters

TI-2026-29620 CVE-2026-40969 · GHSA-37w2-q6vh-45v6

Spring gRPC AuthenticationException message reflected to remote client

Priority LOW 23

The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller in the gRPC status description.

CVSS 3.1MEDIUM 5.3· Network · No auth · No interaction · EPSS 0.002 · Published 2026-04-28 · Fixed in 1.0.3 CWE-209

TI-2026-29619 CVE-2026-40968 · GHSA-4g9c-3x4p-mfpp

Spring gRPC SecurityContext leaks across requests on authorization failure

Priority LOW 37

When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to the gRPC worker thread and can be inherited by a subsequent unauthenticated request on the same thread.

CVSS 3.1HIGH 8.8· Network · Low privileges · No interaction · EPSS 0.00171 · Published 2026-04-28 · Fixed in 1.0.3 CWE-653

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