# CVE-2026-44182 — jupyter-server enterprise_gateway

> As of 2026-07-17, CVE-2026-44182 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 0.3% (27.0th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-44182 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-2026-44182?

Jupyter Enterprise Gateway launches remote Jupyter Notebook kernels across distributed clusters like Apache Spark, Kubernetes, and Docker Swarm. In versions prior to 3.3.0, the server interpolates untrusted environment variables (e.g., KERNEL_XXX) into Kubernetes manifests without YAML-aware escaping, enabling YAML injection attacks. Attackers can inject new fields, overwrite critical fields (e.g., duplicate securityContext keys, where the last one prevails), and inject document boundaries (--- for new documents, ... for end-of-document) to generate multiple resources, potentially creating arbitrary types, such as privileged pods. The Jinja2 template for the Kubernetes manifest contains several kernel_xxx variables, such as kernel_working_dir that are used when rendering the manifest and are all vectors for YAML injection. This issue has been fixed in version 3.3.0.

The record classifies CVE-2026-44182 under weakness class [CWE-74](https://intel.threadlinqs.com/cwe/CWE-74). 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):** 0.3% probability of exploitation in the next 30 days, higher than 27.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.1/10 — 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-2026-44182 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **jupyter-server**: enterprise_gateway

## How to fix CVE-2026-44182

No vendor patch reference has been recorded for CVE-2026-44182 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-2026-44182

No threat campaign in the Threadlinqs corpus currently references CVE-2026-44182, 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, 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-cfw7-6c5v-2wjq)

**Other references**

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

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-44182
Full detection coverage and IOCs for threats exploiting CVE-2026-44182 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp