Vulnerability in jupyterlab (CVE-2026-102832)
Summary
Vulnerability in jupyterlab (CVE-2026-102832). Risk of unauthorized operations or information disclosure. Exploitable via tracker.currentWidget. Mitigation: upgrade to 4.5.11 or later.
Original description
The description as published by the source.
Description
A Markdown file or a notebook output can carry a button that runs a JupyterLab command. Since 4.5.7 the first click on such a button opens a prompt naming the command, with Cancel, Run Once and Trust. Choosing Trust runs the command and marks the document trusted, so its later buttons run without a prompt.
Which document gets marked is decided when the user answers, not when they click. Both trust commands read whichever document is current at that moment: markdownviewer:trust uses tracker.currentWidget, and notebook:trust uses the equivalent lookup. If another document becomes current while the prompt is open, that document is the one marked trusted, and the one the user was looking at stays untrusted.
Users are affected if all of the following are true:
- they run JupyterLab 4.5.7 through 4.6.3, or an application that bundles it such as Notebook 7.5+;
- they open a Markdown file or notebook from someone else and click a button in it;
- they answer Trust rather than Cancel or Run Once; and
- a second document becomes the current one while the prompt is open, for example through a workspace restoring at startup, an extension activating a widget, or a command that opens a file
Impact
The user loses control over which document they trusted. Every button in the document that was (incorrectly) marked as trusted runs from then on without a prompt, so if that document also came from an untrusted source, its buttons fire on a single click with no confi…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-102832 has been found in jupyterlab.
Attackers can target a specific entry point like tracker.currentWidget over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.2/10.
What to do: upgrade jupyterlab to 4.5.11 or later.
If unsure, ask your IT team or search "jupyterlab CVE-2026-102832" on the vendor's site.
CVE-2026-102832 (jupyterlab) — CWE-367 / CVSS v3 4.2
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: tracker.currentWidget / jupyterlab
Patched: 4.5.11 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-367) exists in jupyterlab. Attackers reach the vulnerable code path via tracker.currentWidget without authentication.
Check the vendor advisory for the affected versions of jupyterlab. Attack surface: tracker.currentWidget / jupyterlab.
Severity: Medium (CVSS 4.2/10). Risk of unauthorized operations or information disclosure.
Update to 4.5.11.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'jupyterlab' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'jupyterlab' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
jupyterlabを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade jupyterlab to 4.5.11ステージング環境で 4.5.11 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。