CVE-2026-40968
MEDIUMSpring gRPC SecurityContext leaks across requests on authorization failure
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Scores
CVSS v3
4.2
EPSS
0.0003
EPSS Percentile
10.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-653
Status
published
Products (3)
org.springframework.grpc/spring-grpc
0 - 1.0.3Maven
Spring/Spring gRPC
1.0.0 - 1.0.3
vmware/spring_grpc
< 1.0.3
Published
Apr 28, 2026
Tracked Since
Apr 28, 2026