Arbitrary Code Injection Affecting kserve package, versions <0.21.0-r3


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.32% (23rd percentile)

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  • Snyk IDSNYK-WOLFILATEST-KSERVE-20563168
  • published7 Oct 2026
  • disclosed2 Oct 2026

Introduced: 2 Oct 2026

NewCVE-2026-104851  (opens in a new tab)
CWE-94  (opens in a new tab)
CWE-1336  (opens in a new tab)

How to fix?

Upgrade Wolfi kserve to version 0.21.0-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kserve package and not the kserve package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1