# vLLM: temperature=NaN and temperature=Infinity bypass validation and propagate to GPU kernels

Advisory record · `GHSA-7h4p-rffg-7823`

- **Identifiers:** `GHSA-7h4p-rffg-7823` · `CVE-2026-54235` · `PYSEC-2026-3405`
- **State:** Confirmed
- **Severity:** CVSS 6.9 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-1287](https://cwe.mitre.org/data/definitions/1287.html)
- **Tags:** [CWE-1287](https://agentprime.io/advisories/tag/cwe-1287.md)
- **Published:** 17 Jun 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 17 Jun 2026, 14:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `vllm` (PyPI): affected `>=0.8.5, <0.24.0`; fixed in `0.24.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> vLLM versions from 0.8.5 before 0.24.0 do not reject a temperature value of NaN or positive Infinity, because the validation checks use comparisons that evaluate to False for those values. Such a request can reach GPU sampling kernels and crash the inference worker, affecting all concurrent users. Upgrade to vLLM 0.24.0 or later, which fixes the issue.

Written 4 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.9 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0045, the 39th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:29 UTC: First seen by agentprime
- 31 Oct 2026, 14:29 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7h4p-rffg-7823)

## Sources

- [GitHub Advisory Database: GHSA-7h4p-rffg-7823](https://github.com/advisories/GHSA-7h4p-rffg-7823)
- [OSV: GHSA-7h4p-rffg-7823](https://osv.dev/vulnerability/GHSA-7h4p-rffg-7823)
- <https://github.com/vllm-project/vllm/security/advisories/GHSA-7h4p-rffg-7823>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-54235>
- <https://github.com/vllm-project/vllm/pull/45116>
- <https://github.com/vllm-project/vllm/commit/d598d239737cfa37bcfcb98886ec3f3557fc7198>
- <https://github.com/advisories/GHSA-7h4p-rffg-7823>
- <https://github.com/pypa/advisory-database/tree/main/vulns/vllm/PYSEC-2026-3405.yaml>
- <https://github.com/vllm-project/vllm>
- <https://pypi.org/project/vllm>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-7h4p-rffg-7823>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-7h4p-rffg-7823/>. Everything for agents: <https://agentprime.io/llms.txt>.