CVE-2026-105753: vLLM Multimodal IPC Cache Desync Denial of Service

# CVE-2026-105753: vLLM Multimodal IPC Cache Desync Denial of Service

https://gcdradar.vercel.app/incidents/cve-2026-105753-vllm-multimodal-ipc-cache-desync-denial-of-s · AIR-2026-0232 · closed 2026-10-05

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-05
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-105753
- CVSS: 6.5

## Summary

A cache desync vulnerability in vLLM's multimodal inference engine can occur after a request is rejected, causing subsequent requests using the same media hash to trigger assertions and service availability failures. The issue has been patched in newer versions.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-06: CVE-2026-105753: vLLM: Mirrored multimodal IPC caches desync after a rejected request — a later request reusing the same media hash trips a receiver… (https://github.com/advisories/GHSA-ph3r-5jfg-f84f)
- 2026-10-05: CVE-2026-105753: vLLM is an inference and serving engine for large language models. (https://nvd.nist.gov/vuln/detail/CVE-2026-105753)

## Sources

- 2026-10-05 NVD: CVE-2026-105753: vLLM is an inference and serving engine for large language models. https://nvd.nist.gov/vuln/detail/CVE-2026-105753
- 2026-10-06 GitHub Advisory Database: CVE-2026-105753: vLLM: Mirrored multimodal IPC caches desync after a rejected request — a later request reusing the same media hash trips a receiver… https://github.com/advisories/GHSA-ph3r-5jfg-f84f

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.