CVE WatchJul 15, 2026

CVE-2026-5497

vLLM versions 0.8.0 and later are vulnerable to an Out-of-Memory (OOM) Denial of Service (DoS) attack due to unbounded frame count processin

CVSS

7.5

High

EPSS

0.5%

p42

KEV

—

Exploit Today

0-100

Published: Jun 11, 2026 · Last modified: Jul 15, 2026 · CWE-400 · CWE-770

EPSS · 30d

0.5%EPSS · 30 days0.6%

2026-06-302026-07-17

Technical description

vLLM versions 0.8.0 and later are vulnerable to an Out-of-Memory (OOM) Denial of Service (DoS) attack due to unbounded frame count processing in the `VideoMediaIO.load_base64()` method. When processing `video/jpeg` data URLs, the method splits the base64 data string on commas to extract individual JPEG frames without enforcing a frame count limit. An attacker can exploit this by crafting a single API request containing thousands of comma-separated base64-encoded JPEG frames in a data URL, causing the server to decode all frames into memory and crash due to excessive memory consumption. This vulnerability is reachable via the OpenAI-compatible chat completions API and does not require authentication.

Official references

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