Detections
Analytics

Echo: fsspec: security update to 2026.6.0

high Tenable Self-Hosted Container Security Plugin ID 473583

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - fsspec is a specification and Python implementation framework for filesystem interfaces. From 0.9.0 until
 2026.6.0, fsspec.implementations.reference.ReferenceFileSystem evaluates fields from Kerchunk reference
 JSON documents through unrestricted jinja2.Template(...).render(...) calls in
 _process_references1._render_jinja, _process_templates, and _process_gen in
 fsspec/implementations/reference.py. A document supplied inline or fetched from an attacker-controlled URL
 can provide template expressions that execute Python code when the reference filesystem is opened,
 including through consumers such as xarray, before referenced data is read. The _process_gen path is
 reached whenever a document includes a gen array, while the other paths depend on template-related options
 and values. This issue is fixed in version 2026.6.0. (CVE-2026-104851)

Solution

Update the fsspec library and its related packages to version 2026.6.0 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-104851

Plugin Details

Severity: High

ID: 473583

Version: Revision 1.1

Type: Local

Published: 10/7/2026

Updated: 10/7/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.37

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-104851

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2026

Vulnerability Publication Date: 10/2/2026

Reference Information

CVE: CVE-2026-104851