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CVE-2026-22778— vLLM leaks a heap address when PIL throws an error

Quick assessment

Affected
vllm-project vllm
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

vLLM是vLLM开源的一个适用于 LLM 的高吞吐量和内存高效推理和服务引擎。 vLLM 0.8.3至0.14.1之前版本存在日志信息泄露漏洞，该漏洞源于处理无效图像时泄露堆地址，可能降低ASLR有效性并最终导致远程代码执行。

CVSS 9.8 · Critical EPSS 11.16% · P96

Affected Version Matrix 1

VendorProduct Version RangeStatus
vllm-project vllm >= 0.8.3, < 0.14.1 affected
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I. Basic Information for CVE-2026-22778

Vulnerability Information
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Vulnerability Title
vLLM leaks a heap address when PIL throws an error
Source: CVE Program / CVE List V5
Vulnerability Description
vLLM is an inference and serving engine for large language models (LLMs). From 0.8.3 to before 0.14.1, when an invalid image is sent to vLLM's multimodal endpoint, PIL throws an error. vLLM returns this error to the client, leaking a heap address. With this leak, we reduce ASLR from 4 billion guesses to ~8 guesses. This vulnerability can be chained a heap overflow with JPEG2000 decoder in OpenCV/FFmpeg to achieve remote code execution. This vulnerability is fixed in 0.14.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
vLLM 日志信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
vLLM是vLLM开源的一个适用于 LLM 的高吞吐量和内存高效推理和服务引擎。 vLLM 0.8.3至0.14.1之前版本存在日志信息泄露漏洞，该漏洞源于处理无效图像时泄露堆地址，可能降低ASLR有效性并最终导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
vllm-project vllm >= 0.8.3, < 0.14.1 -

II. Public POCs for CVE-2026-22778

# POC Description Source Link Shenlong Link
1 vLLM 0.8.3 to - 0.14.1 contains an information disclosure caused by leaking a heap address in error messages from the multimodal endpoint when processing invalid images, letting remote attackers reduce ASLR entropy, exploit requires sending invalid images. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-22778.yaml POC Details
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III. Intelligence Information for CVE-2026-22778

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Vendor Advisories for CVE-2026-22778 (1)

IV. Related Vulnerabilities

Same product: vllm
Same vendor: vllm-project
Same weakness: CWE-532

V. Comments for CVE-2026-22778

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