CVE-2026-94626 vLLM - Denial of Service

vLLM through 0.29.0 contains an unbounded memory allocation vulnerability caused by failure to validate the tp_size parameter in kv_transfer_params on OpenAI-compatible completion endpoints, letting attackers exhaust memory and trigger kernel OOM-kill, exploit requires attacker to supply arbitrary tp_size values in prefill/decode disaggregated deployments.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
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-789

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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