SecuriTricks - CVE-2026-40968

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.

Product(s) Impacted

Vendor	Product	Versions
Spring	Spring Grpc	1.0.0-1.0.2, 1.0.3

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-653

Improper Isolation or Compartmentalization

The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	spring	spring_grpc	1.0.0-1.0.2	/	/	/	/	/	/	/
a	spring	spring_grpc	1.0.3	/	/	/	/	/	/	/

References

https://spring.io/security/cve-2026-40968

CVSS Score

4.2 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: LOW
Availability Impact: NONE

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

View Vector String

Timeline

Published: April 28, 2026, 3:16 p.m.
Last Modified: April 28, 2026, 8:10 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-40968