---
title: "fsspec — CVE-2026-104851"
description: "A remote code execution flaw affects the PyPI package fsspec. Affected versions: >= 0.9.0, < 2026.6.0. Fixed from version 2026.6.0. CVSS score 8.8."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-05-cve-2026-104851
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-05
dateModified: 2026-10-05
---
# fsspec — CVE-2026-104851

A remote code execution flaw affects the PyPI package fsspec. Affected versions: >= 0.9.0, < 2026.6.0. Fixed from version 2026.6.0. CVSS score 8.8.

## What to do

Update fsspec to 2026.6.0 or later.

| Fact | Value |
| --- | --- |
| Package | fsspec |
| Ecosystem | PyPI (Python) |
| Class | Remote code execution |
| Affected versions | >= 0.9.0, < 2026.6.0 |
| Fixed version | 2026.6.0 |
| CVSS | 8.8 |
| CVE | CVE-2026-104851 |
| GHSA | GHSA-27vj-qcqg-25rc |
| Published on | October 5, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-27vj-qcqg-25rc](https://github.com/advisories/GHSA-27vj-qcqg-25rc) — GitHub Security Advisories
- [NVD — CVE-2026-104851](https://nvd.nist.gov/vuln/detail/CVE-2026-104851) — NVD

---

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