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CVE-2026-115918 Details

Description

vLLM is an inference and serving engine for large language models. From 0.16.0 until 0.32.0, the /v1/responses endpoint allows an authenticated caller to place an attacker-controlled template in chat_template_kwargs[chat_template] when no server template is configured. ChatParams.get_apply_chat_template_kwargs() preserves that value without enforcing trust_request_chat_template, so the request can bypass the intended trust policy and cause CPU or memory exhaustion through Jinja rendering. This issue is fixed in version 0.32.0.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/vllm-project/vllm/commit/cff08b461e086523cee8bba5bd3c66d302625134	[email protected]	Patch
https://github.com/vllm-project/vllm/pull/50300	[email protected]	Patch
https://github.com/vllm-project/vllm/releases/tag/v0.32.0	[email protected]	Release Notes
https://github.com/vllm-project/vllm/security/advisories/GHSA-x567-49g5-p4cf	[email protected]	PatchVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	[email protected]
CWE-770	Allocation of Resources Without Limits or Throttling	[email protected]

Affected Products

Product	Versions
vllm vllm	>= 0.16.0, < 0.32.0
CPE cpe:2.3:a:vllm:vllm:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 30, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	Initial Analysis	[email protected]
Oct 26, 2026	New CVE Received	[email protected]