DEBIAN-CVE-2026-104851
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-104851
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104851.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-104851
- Upstream
- Published
- 2026-10-02T17:17:03Z
- Modified
- 2026-10-03T05:00:12Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:12 / fsspec
Package
- Name
- fsspec
- Purl
- pkg:deb/debian/fsspec?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / fsspec
Package
- Name
- fsspec
- Purl
- pkg:deb/debian/fsspec?arch=source&distro=trixie
Debian:14 / fsspec
Package
- Name
- fsspec
- Purl
- pkg:deb/debian/fsspec?arch=source&distro=forky