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CVE-2026-115918

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-115918

Severity

6.5

Medium

CVSS V3

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Summary

vLLM: Responses API bypasses trust_request_chat_template for chat_template_kwargs

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.

Affected packages


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