CVE-2026-40968: When an authenticated user is denied access to a gRPC method, their authenticated identity remains bound to th

Q: How do I fix CVE-2026-40968?

spring grpc: upgrade to 1.0.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-40968 being exploited?

CVE-2026-40968 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40968 affect?

CVE-2026-40968 affects spring grpc. Severity is medium (CVSS 4.2). 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 subsequen

Q: How urgent is CVE-2026-40968?

Priority 16/100. No elevated risk signals yet.

Routine

MEDIUM 4.2UPGRADE

CVE-2026-40968 is a medium-severity flaw (CVSS 4.2) affecting spring grpc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-653
Published	2026-04-28
Last modified	2026-10-26

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-28 15:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

vmware spring grpc UPGRADE

Affected: < 1.0.3

Fixed in: 1.0.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy spring-grpc || rpm -q spring-grpc || spring-grpc --version

2. UPGRADE to 1.0.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-grpc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-grpc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40968?

spring grpc: upgrade to 1.0.3. Exact commands for each OS are on this page.

Is CVE-2026-40968 being exploited?

CVE-2026-40968 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40968 affect?

CVE-2026-40968 affects spring grpc. Severity is medium (CVSS 4.2). 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 subsequen

How urgent is CVE-2026-40968?

Priority 16/100. No elevated risk signals yet.

Software pages

VMware vulnerabilities

Related CVEs

CVE-2026-40969 LOW 3.7 UPGRADE The raw message of every server-side AuthenticationException is returned to the unauthenticated remote caller

References

← Back to latest CVEs