CVE-2026-119083: GluonTS arbitrary file write during archive extraction

CVE-2026-119083 · Severity: high · CVSS 7.8 · Published 2026-11-05

GluonTS is a Python library used for time series modeling and forecasting. A vulnerability in its archive extraction utility allows an attacker who provides a crafted tar file with symbolic or hard links to write arbitrary files to the system with the privileges of the extracting process, potentially leading to data corruption, code execution, or system compromise.

Technologies: Amazon AWS. Vendors: Amazon, AWS.

Quick answers

Is CVE-2026-119083 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-119083 being exploited in the wild.
How severe is CVE-2026-119083?
High severity, with a CVSS score of 7.8, published 5 November 2026.
Which products and versions are affected?
AWS GluonTS before 0.17.0.
Is there a fix for CVE-2026-119083?
Yes: fixed in 0.17.0. Until then: Do not use GluonTS to extract tar archives from untrusted or unverified sources. As a defense-in-depth measure, running on Python 3.14 or later applies the data extraction filter by default in TarFile.extractall(), which blocks the link-based traversal described in this vulnerability. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-119083 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-119083?
Check whether you run Amazon AWS or AWS GluonTS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 0.17.0

Do not use GluonTS to extract tar archives from untrusted or unverified sources. As a defense-in-depth measure, running on Python 3.14 or later applies the data extraction filter by default in TarFile.extractall(), which blocks the link-based traversal described in this vulnerability.

Technical details

The vulnerability exists in GluonTS versions before 0.17.0 in the archive extraction utility, where improper handling of symbolic and hard links in tar archives allows path traversal outside the intended extraction directory. An attacker must supply a crafted tar archive containing malicious links; the extracting process executes with the privileges of the calling application. The issue is fixed in version 0.17.0 through proper link validation during extraction.

Affected products

  • AWS GluonTS before 0.17.0

Timeline

  • 2026-11-05: disclosed

References

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