CVE-2026-94623 vLLM - Denial of Service

vLLM through 0.29.0 contains a denial of service vulnerability caused by improper validation of block counts in the NIXL connector's prefix caching during multi-prompt completion requests, letting attackers cause worker termination, exploit requires crafted multi-prompt requests.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.63% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-617

Vendor fix

Update to the latest version beyond 0.29.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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