# CVE-2026-44181 — jupyter-server enterprise_gateway

> As of 2026-07-17, CVE-2026-44181 is a Critical-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in jupyter-server enterprise_gateway, CVSS v4.0 10, EPSS 0.4% (37.0th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-44181 as of 2026-07-17; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-17

## What is CVE-2026-44181?

Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions 2.0.0rc2 and above, prior to 3.3.0, the environment variables (KERNEL_XXX) used during the rendering of the Kubernetes manifest are vulnerable to Server Side Template Injection (SSTI). By including Jinja2 template expressions it is possible to execution Python code and OS Commands in the Enterprise Gateway service. The code can use or steal the Kubernetes service account token, which can steal Kubernetes secrets and be used to fully compromise the Kubernetes cluster by scheduling a privileged pod or a pod with a hostPath volume mount. This issue has been fixed in version 3.3.0.

The record classifies CVE-2026-44181 under weakness class [CWE-1336](https://intel.threadlinqs.com/cwe/CWE-1336). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 81 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 10 — Critical (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 37.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-16, last modified 2026-07-17

## Is CVE-2026-44181 being exploited?

It currently carries a trending score of 39 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **jupyter-server**: enterprise_gateway

Affected software packages:

- `pip:jupyter_enterprise_gateway` — patched in 3.3.0

## How to fix CVE-2026-44181

Fixed versions are recorded for 1 package: pip:jupyter_enterprise_gateway 3.3.0. No vendor patch reference has been recorded for CVE-2026-44181 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-44181

No threat campaign in the Threadlinqs corpus currently references CVE-2026-44181, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, GitHub Security Advisories, FIRST EPSS. Last verified by Threadlinqs on 2026-07-18. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/jupyter-server/enterprise_gateway/security/advisories/GHSA-f49j-v924-fx9w)

**Other references**

- [github.com](https://github.com/jupyter-server/enterprise_gateway/releases/tag/v3.3.0)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-44181
Full detection coverage and IOCs for threats exploiting CVE-2026-44181 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp