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Advisory record · GHSA-f49j-v924-fx9w

Jupyter Enterprise Gateway: Jinja2 Template Server Side Template Injection resulting in Remote Code Execution

CVSS 10.0 CriticalCriticalEPSS 0.0077 · 56th percentile

Critical, because:

  • CVSS score 10.0: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 29 Jun 2026, 11:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
jupyter-enterprise-gatewayPyPI>=2.0.0rc2, <3.3.03.3.0
Identifiers
GHSA-f49j-v924-fx9w · CVE-2026-44181 · PYSEC-2026-364
Weakness (CWE)
CWE-1336
Tags
Published
29 Jun 2026
Updated
1 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Jupyter Enterprise Gateway versions 2.0.0rc2 up to but not including 3.3.0 are vulnerable. The environment variables used when rendering the Kubernetes kernel pod manifest are passed into a Jinja2 template without safe handling, so an attacker who can supply those values through the API can inject template expressions. This allows execution of Python code and OS commands inside the Enterprise Gateway pod, including access to its Kubernetes service account token. Upgrade to version 3.3.0.

Written 10 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
10.0 Critical 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0077, the 56th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 29 Jun 2026. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.