Detections
Analytics

SCA: security update for vllm (GHSA-3mwp-wvh9-7528)

medium Tenable Cloud Security Plugin ID 439796

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - vLLM is an inference and serving engine for large language models (LLMs). From 0.1.0 to before 0.19.0, a
 Denial of Service vulnerability exists in the vLLM OpenAI-compatible API server. Due to the lack of an
 upper bound validation on the n parameter in the ChatCompletionRequest and CompletionRequest Pydantic
 models, an unauthenticated attacker can send a single HTTP request with an astronomically large n value.
 This completely blocks the Python asyncio event loop and causes immediate Out-Of-Memory crashes by
 allocating millions of request object copies in the heap before the request even reaches the scheduling
 queue. This vulnerability is fixed in 0.19.0. (CVE-2026-34756)

Solution

Update the vllm library and its related packages to version 0.19.0 or later.

See Also

https://github.com/advisories/GHSA-3mwp-wvh9-7528

Plugin Details

Severity: Medium

ID: 439796

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 4/3/2026

Updated: 6/1/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2026-34756

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/3/2026

Vulnerability Publication Date: 4/3/2026

Reference Information

CVE: CVE-2026-34756

cwe: CWE-770