CVE-2026-40968 (GCVE-0-2026-40968)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:42 – Updated: 2026-04-28 14:36
VLAI?
Title
Spring gRPC SecurityContext leaks across requests on authorization failure
Summary
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.
Severity ?
4.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
Impacted products
Vendor Product Version
Spring Spring gRPC Affected: 1.0.0 , < 1.0.3 (custom)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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