CVE-2026-115911 vLLM: DoS via unbounded chat_template Jinja2 rendering exhausts the renderer thread pool

vLLM is an inference and serving engine for large language models. From 0.19.0 until 0.32.0, authenticated callers can supply a request chat template when no server-side --chat-template is configured, or a malicious model repository can provide a template that is compiled and rendered by...

CVE-2026-115911

The vLLM inference and serving engine (versions 0.19.0 through 0.32.0 ) is vulnerable to a Denial of Service (DoS) attack due to unbounded Jinja2 rendering in the tokenizer.apply_chat_template() function. Authenticated callers can provide a request chat template (when no server-side template is c...

CVE-2026-90878

A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chattemplate causes resource consumption. The attack can be initiated remotely. The exploit...

Allocation of Resources Without Limits or Throttling

Overview vllm is an A high-throughput and memory-efficient inference and serving engine for LLMs Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the Jinja Template Rendering of the /v1/chat/completions endpoint when manipulating the...

CVE-2026-90878

A flaw was found in vllm-project vLLM. A remote attacker could exploit a vulnerability in the Jinja Template Rendering component by manipulating the chattemplate argument. This manipulation leads to excessive resource consumption, potentially causing a Denial of Service DoS condition for the...

CVE-2026-90878 vllm-project vLLM Jinja Template Rendering completions resource consumption

A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chattemplate causes resource consumption. The attack can be initiated remotely. The exploit...

CVE-2026-90878

vLLM (vllm-project) versions up to 0.27.1 are affected by a resource consumption vulnerability in the Jinja Template Rendering component of the /v1/chat/completions endpoint. The root cause is manipulation of the chat_template argument, allowing a remote attacker with low privileges to trigger ex...

CVE-2026-90878 vllm-project vLLM Jinja Template Rendering completions resource consumption

A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chattemplate causes resource consumption. The attack can be initiated remotely. The exploit...

CVE-2026-90878 vllm-project vLLM Jinja Template Rendering completions resource consumption

A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chattemplate causes resource consumption. The attack can be initiated remotely. The exploit...

EUVD-2026-78268

A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chattemplate causes resource consumption. The attack can be initiated remotely. The exploit...

CVE-2026-90878: Uncontrolled Resource Consumption

A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chattemplate causes resource consumption. The attack can be initiated remotely. The exploit...

Transformers save_pretrained path traversal allows arbitrary file writes through chat template names

A vulnerability in huggingface/transformers versions 5.10.0 allows an attacker to perform arbitrary file writes via path traversal. The issue resides in the savepretrained methods of PreTrainedTokenizerBase and ProcessorMixin, where keys from the chattemplate dictionary are used directly as...

Directory Traversal

Overview transformers is a State-of-the-art Machine Learning for JAX, PyTorch and TensorFlow Affected versions of this package are vulnerable to Directory Traversal in the savepretrained methods of PreTrainedTokenizerBase and ProcessorMixin, which build each chat template's output path by joining...

CVE-2026-9856

The CVE-2026-9856 entry describes a path traversal flaw in huggingface/transformers

CVE-2026-9856: Improper Limitation of a Pathname to a Restricted Directory

A vulnerability in huggingface/transformers versions =5.8.0.dev0 allows an attacker to perform arbitrary file writes via path traversal. The issue resides in the savepretrained methods of PreTrainedTokenizerBase and ProcessorMixin, where keys from the chattemplate dictionary are used directly as...

vLLM: Resource-Exhaustion (DoS) through Malicious Jinja Template in OpenAI-Compatible Server

SummaryA resource-exhaustion denial-of-service vulnerability exists in multiple endpoints of the OpenAI-Compatible Server due to the ability to specify Jinja templates via the chattemplate and chattemplatekwargs parameters. If an attacker can supply these parameters to the API, they can cause a...