CVE-2026-104851

CVE-2026-104851 · fsspec: Server-Side Template Injection in ReferenceFileSystem leads to Remote Code Execution

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

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 8.8 · Alta · EPSS 0,5% · Corrección disponible

Publicación

2026-10-02T16:36:48.513Z

Actualización

2026-10-05T20:03:36.502Z

Pila tecnológica: system · python

Comprueba tu servidor →