CVE-2026-40968
CVE-2026-40968 is a medium-severity vulnerability in Vmware Spring Grpc with a CVSS 3.x base score of 4.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-653.
Key facts
- Severity: Medium (CVSS 3.x base score 4.2)
- EPSS exploit prediction: 0% (7th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26054
- Weakness: CWE-653
- Affected product: Vmware Spring Grpc
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-40968?
- 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 severe is CVE-2026-40968?
- CVE-2026-40968 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2026-40968 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-40968?
- CVE-2026-40968 affects Vmware Spring Grpc. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-40968?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-40968 have an EU (EUVD) identifier?
- Yes. CVE-2026-40968 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26054.
- When was CVE-2026-40968 published?
- CVE-2026-40968 was published on 2026-04-28 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:vmware:spring_grpc:*:*:*:*:*:*:*:*
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