CVE-2026-42266: Extension Installation Vulnerability in JupyterLab
平台
python
组件
jupyterlab
修复版本
4.5.7
CVE-2026-42266 is a high-severity vulnerability affecting JupyterLab versions 4.0.0 through 4.5.6. It allows attackers to bypass the intended restriction on extension sources, enabling the installation of malicious extensions from outside the default PyPI index. This can lead to arbitrary code execution within the JupyterLab environment. The vulnerability is fixed in version 4.5.7 and has been published on May 13, 2026.
检测此 CVE 是否影响你的项目
上传你的 requirements.txt 文件，立即知道是否受影响。
影响与攻击场景翻译中…
The core impact of CVE-2026-42266 lies in the ability to install arbitrary extensions. An attacker could leverage this to inject malicious code into the JupyterLab environment, gaining control over user sessions and potentially accessing sensitive data. This could manifest as a rogue extension that steals credentials, modifies notebooks, or even compromises the underlying system. The blast radius extends to any user utilizing a vulnerable JupyterLab instance, particularly those with administrative privileges or access to sensitive data within notebooks. While no direct precedent exists mirroring this exact vulnerability, the potential for malicious extension installation shares similarities with other supply chain attacks targeting software ecosystems.
利用背景翻译中…
CVE-2026-42266 is currently not listed on KEV (Kernel Exploit Vulnerability Database) or EPSS (Exploit Prediction Scoring System). The lack of an EPSS score suggests a low to medium probability of exploitation, primarily due to the technical expertise required to identify and exploit the vulnerability. No public proof-of-concept (POC) code has been publicly released as of the publication date. The NVD (National Vulnerability Database) and CISA (Cybersecurity and Infrastructure Security Agency) entries were published on May 13, 2026.
威胁情报
漏洞利用状态
CISA SSVC
CVSS 向量
这些指标意味着什么？
- Attack Vector
- 网络 — 可通过互联网远程利用，无需物理或本地访问。攻击面最大。
- Attack Complexity
- 低 — 无需特殊条件，可以稳定地利用漏洞。
- Privileges Required
- 低 — 任何有效用户账户均可。
- User Interaction
- 无 — 攻击自动且无声，受害者无需任何操作。
- Scope
- 未改变 — 影响仅限于脆弱组件本身。
- Confidentiality
- 高 — 完全丧失机密性，攻击者可读取所有数据。
- Integrity
- 高 — 攻击者可写入、修改或删除任何数据。
- Availability
- 高 — 完全崩溃或资源耗尽，完全拒绝服务。
受影响的软件
弱点分类 (CWE)
时间线
- 已保留
- 发布日期
缓解措施和替代方案翻译中…
The primary mitigation for CVE-2026-42266 is to upgrade JupyterLab to version 4.5.7 or later. If upgrading is not immediately feasible, consider implementing stricter network controls to prevent JupyterLab instances from accessing untrusted PyPI mirrors. Additionally, review and audit existing JupyterLab extensions to identify any potentially malicious or outdated components. While a WAF or proxy cannot directly prevent this vulnerability, they can be configured to monitor for suspicious extension installation requests. There are no specific Sigma or YARA rules available for this vulnerability at this time, but monitoring extension installation logs is recommended.
修复方法翻译中…
Actualice JupyterLab a la versión 4.5.7 o superior para mitigar esta vulnerabilidad. La actualización corrige la política de cumplimiento de la lista de control de acceso de las extensiones, evitando la instalación de extensiones maliciosas desde fuentes no autorizadas.
常见问题翻译中…
What is CVE-2026-42266 — Extension Installation Vulnerability in JupyterLab?
CVE-2026-42266 is a high-severity vulnerability in JupyterLab (versions 4.0.0–<4.5.7) that allows attackers to bypass extension source restrictions and install malicious extensions from arbitrary PyPI sources, potentially leading to code execution.
Am I affected by CVE-2026-42266 in JupyterLab?
You are affected if you are using JupyterLab versions 4.0.0 through 4.5.6. Check your version using jupyter lab --version.
How do I fix CVE-2026-42266 in JupyterLab?
Upgrade JupyterLab to version 4.5.7 or later. This resolves the vulnerability by correctly enforcing the allowedextensionsuris list.
Is CVE-2026-42266 being actively exploited?
As of May 13, 2026, there is no public evidence of active exploitation, but the vulnerability's potential impact warrants immediate remediation.
Where can I find the official JupyterLab advisory for CVE-2026-42266?
Refer to the official JupyterLab security advisory, which can be found on the JupyterLab GitHub repository and the NVD database (search for CVE-2026-42266).
检测此 CVE 是否影响你的项目
上传你的 requirements.txt 文件，立即知道是否受影响。
立即扫描您的Python项目 — 无需账户
Upload your requirements.txt and get the vulnerability report instantly. No account. Uploading the file is just the start: with an account you get continuous monitoring, Slack/email alerts, multi-project and white-label reports.
拖放您的依赖文件
composer.lock、package-lock.json、requirements.txt、Gemfile.lock、pubspec.lock、Dockerfile...