fsspec: Server-Side Template Injection in ReferenceFileSystem leads to Remote Code Execution

Summaryfsspec.implementations.reference.ReferenceFileSystem parses a "references"JSON document Kerchunk format supplied either inline or via a URL. Theparser renders fields from this JSON through un-sandboxedjinja2.Template....render... calls in three locations. An attacker whocontrols the JSON...

PYSEC-2026-4217 fsspec: Server-Side Template Injection in ReferenceFileSystem leads to Remote Code Execution

Summary fsspec.implementations.reference.ReferenceFileSystem parses a "references" JSON document Kerchunk format supplied either inline or via a URL. The parser renders fields from this JSON through un-sandboxed jinja2.Template....render... calls in three locations. An attacker who controls the...

openSUSE 16 Security Update : python-fsspec (openSUSE-SU-2026:22028-1)

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:22028-1 advisory. Changes in python-fsspec: - CVE-2026-104851: python-fsspec: remote code execution via server-side template injection in ReferenceFileSystem bsc1284173...

Security update for python-fsspec (important)

openSUSE security update: security update for python-fsspec ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:22028-1 Rating: important References: bsc1284173 Cross-References: CVE-2026-104851 Affected Products: openSUSE Leap 16.0...

OPENSUSE-SU-2026:22028-1 Security update for python-fsspec

This update for python-fsspec fixes the following issues: Changes in python-fsspec: - CVE-2026-104851: python-fsspec: remote code execution via server-side template injection in ReferenceFileSystem bsc1284173...

GHSA-27VJ-QCQG-25RC fsspec: Server-Side Template Injection in ReferenceFileSystem leads to Remote Code Execution

Summary fsspec.implementations.reference.ReferenceFileSystem parses a "references" JSON document Kerchunk format supplied either inline or via a URL. The parser renders fields from this JSON through un-sandboxed jinja2.Template....render... calls in three locations. An attacker who controls the...

EUVD-2026-91720

fsspec: Server-Side Template Injection in ReferenceFileSystem leads to Remote Code Execution...

fsspec: Server-Side Template Injection in ReferenceFileSystem leads to Remote Code Execution

Summary fsspec.implementations.reference.ReferenceFileSystem parses a "references" JSON document Kerchunk format supplied either inline or via a URL. The parser renders fields from this JSON through un-sandboxed jinja2.Template....render... calls in three locations. An attacker who controls the...

Linux Distros Unpatched Vulnerability : CVE-2026-104851

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fsspec is a specification and Python implementation framework for filesystem interfaces. From 0.9.0 until 2026.6.0,...

CVE-2026-104851

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...

DEBIAN-CVE-2026-104851

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...

UBUNTU-CVE-2026-104851

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...

CVE-2026-104851

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...

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

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...

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

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...

CVE-2026-104851

The fsspec Python implementation framework (versions 0.9.0 through 2026.6.0 ) is vulnerable to Remote Code Execution (RCE) due to unrestricted jinja2 template evaluation. The flaw exists in fsspec.implementations.reference.ReferenceFileSystem when processing Kerchunk reference JSON documents via ...

CVE-2026-104851

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...

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

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...

PT-2026-104404

Name of the Vulnerable Software and Affected Versions fsspec versions 0.9.0 through 2026.6.0 Description The fsspec.implementations.reference.ReferenceFileSystem evaluates fields from Kerchunk reference JSON documents using unrestricted jinja2.Template....render... calls within the process...

CVE-2026-104851: Improper Control of Generation of Code

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...