CVE-2026-22778

CRITICAL 9.8

vLLM leaks a heap address when PIL throws an error

CVSS Score

9.8

EPSS Score

3.3%

EPSS Percentile

87th

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.

CWE	CWE-532
Vendor	vllm-project
Product	vllm
Published	Feb 2, 2026
Last Updated	Jun 27, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

vllm-project / vllm

>= 0.8.3, < 0.14.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗