vLLM multimodal heap-address information disclosure
CVE-2026-22778 is an information disclosure vulnerability in vLLM affecting versions 0.8.3 through 0.14.0. When an invalid image is submitted to a multimodal OpenAI-compatible endpoint such as /v1/chat/completions, Pillow/PIL can raise an UnidentifiedImageError during image handling. vLLM returns the raw exception text to the client, and that error string can include the Python representation of a BytesIO object, for example '<_io.BytesIO object at 0x...>', thereby disclosing a heap address from the server process. The issue is described as an ASLR-bypassing primitive and a prerequisite stage in a larger exploitation chain involving a JPEG2000 heap overflow in OpenCV/FFmpeg. The available content identifies sanitize_message as part of the fix path and states the issue was fixed in vLLM 0.14.1.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An information disclosure vulnerability in vLLM OpenAI-compatible multimodal servers where a malformed image can trigger Pillow to leak a BytesIO heap address in an error response, described as the ASLR-bypassing first stage of a JPEG2000 heap-overflow RCE chain.
An information disclosure vulnerability in vLLM multimodal handling that leaks heap memory addresses via error output or object representations, aiding attackers by exposing memory layout details.
An earlier vLLM vulnerability whose original fix was incomplete, leading to CVE-2026-54236.
A remote code execution (RCE) vulnerability in vLLM triggered via a malicious video URL.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.