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Advisory record · GHSA-hwvq-6gjx-j797

Special Element Injection in notebook

CVSS 10.0 CriticalCriticalEPSS 0.021 · 81st percentile

Critical, because:

  • CVSS score 10.0: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 23 Aug 2021, 19:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
notebookPyPI<5.7.11 || >=6.0.0, <6.4.15.7.11, 6.4.1
Identifiers
GHSA-hwvq-6gjx-j797 · BIT-jupyter-base-notebook-2021-32798 · BIT-jupyter-notebook-2021-32798 · CVE-2021-32798 · PYSEC-2021-118
Weakness (CWE)
CWE-75 · CWE-79 · CWE-80
Tags
Published
23 Aug 2021
Updated
10 Sept 2026

Machine-written summary

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

The notebook package versions before 5.7.11 and from 6.0.0 before 6.4.1 are vulnerable. An attacker can supply a crafted notebook that executes code when a user opens it, which the advisory describes as remote code execution requiring user action. Upgrade to notebook 5.7.11 or 6.4.1.

Written 5 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 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.021, the 81st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:37 UTC First seen by agentprime
  2. 31 Oct 2026, 14:37 UTC Confirmed by OSV

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.