CVE-2026-22778 vLLM leaks a heap address when PIL throws an error
vLLM leaks heap addresses via error messages, reducing ASLR effectiveness and enabling remote code execution when chained with other vulnerabilities.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-22778?
CVE-2026-22778 is a critical vulnerability in Vllm Vllm, published on 2 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-22778?
3 open source packages ship an affected version, including vllm. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vllm PyPI | From 0.8.3 | 0.14.1 |
vllm PyPI | From 0.8.3 | 0.14.1 |
vllm PyPI | From 0.8.3 | 0.14.1 |
Products include Vllm Vllm.
How do I fix CVE-2026-22778?
Upgrade vllm to 0.14.1 or later.
Is CVE-2026-22778 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-22778 exists.
Public exploit code: 1 Metasploit module, 1 Nuclei template and 1 proofs of concept on GitHub.
Other vulnerabilities in Vllm Vllm
- CVE-2025-32444 vLLM Vulnerable to Remote Code Execution via Mooncake Integration
- CVE-2025-47277 vLLM Allows Remote Code Execution via PyNcclPipe Communication Service
- CVE-2024-11041 Remote Code Execution in vllm-project/vllm
- CVE-2026-48746 vLLM: OpenAI auth bypass
- CVE-2025-29783 vLLM Allows Remote Code Execution via Mooncake Integration
Sources
Also known as GHSA-4r2x-xpjr-7cvv, PYSEC-2026-565.