CVE-2026-40968
Spring gRPC SecurityContext leaks across requests upon authorization failure
4.2
MEDIUM
CVSS 3.1
EPSS 0.04%
Description
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. This may allow the subsequent user to gain escalated permissions. Affected versions: Spring gRPC: 1.0.0 - 1.0.2 (fixed in 1.0.3). Older, unsupported versions are also affected.
How to fix CVE-2026-40968
To remediate CVE-2026-40968, upgrade the affected package to a fixed version below.
- —upgrade to 1.0.3 or later
Is CVE-2026-40968 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.0.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |