---
id: "CVE-2026-115914"
kind: "vulnerability"
aliases: ["CVE-2026-115914"]
title: "vLLM: crafted OCR image crashes the inference engine for all users"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["ai-tooling", "gpu-inference", "llm-serving", "python", "self-hosted", "vllm"]
not_affected_if: ["api-not-reachable-by-clients", "text-only-models", "version-0.32.0-or-later"]
published_at: "2026-10-26T18:17:38+00:00"
first_seen_at: "2026-10-26T18:31:43+00:00"
updated_at: "2026-10-26T18:34:03+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115914", "first_seen_at": "2026-10-26T18:31:43+00:00"}]
---

# vLLM: crafted OCR image crashes the inference engine for all users

vLLM versions from 0.11.1 up to 0.32.0 let a remote client send a specific legal image to the DeepSeek-OCR image path, which makes the serving engine hit a fatal assertion and shut down. An attacker can take the engine offline for every user of the server with one request.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `python -c "import vllm; print(vllm.__version__)"` to read the installed vLLM version
- Check whether the server serves DeepSeek-OCR, DeepSeek-OCR-2 or Unlimited-OCR models through the OpenAI-compatible API

## Fix

- Upgrade vLLM to `0.32.0` or later
- Until upgraded, restrict who can reach the OpenAI-compatible API endpoint

## Timeline

- 2026-10-26T18:31:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115914

## From the sources

vLLM is an inference and serving engine for large language models. From 0.11.1 until 0.32.0, the DeepSeek-OCR, DeepSeek-OCR-2, and Unlimited-OCR image path allows a remote client that can reach the OpenAI-compatible API to submit a legal image whose normalized pixels sum to zero when that image is alone in its per-step encoder batch. _parse_and_validate_image_input returns no embedding, embed_multimodal propagates that value, and sanity_check_mm_encoder_outputs triggers a fatal assertion that shuts down the engine for all users. This issue is fixed in version 0.32.0.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_