# nbconvert (PyPI) vulnerabilities Source: https://junglewise.ai/threats/technologies/nbconvert Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/nbconvert.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 6 vulnerabilities in nbconvert (PyPI): 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-114140, was published on 21 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 1 - All time: 6 (0 critical, 0 exploited in the wild) ## About nbconvert (PyPI) nbconvert is a Python tool for converting Jupyter notebooks to various file formats. ## Latest nbconvert (PyPI) vulnerabilities - [CVE-2026-114140: Jupyter nbconvert path traversal via output filename metadata](https://junglewise.ai/threats/cve-2026-114140-the-nbconvert-tool-jupyter-nbconvert-converts-jupyter-notebooks) (high, CVSS 4, published 21 Oct 2026) - [CVE-2025-53000: PYSEC-2026-1691 - nbconvert has an uncontrolled search path that leads to unauthorized code execution on Windows](https://junglewise.ai/threats/cve-2025-53000-nbconvert-has-an-uncontrolled-search-path-that-leads-to) (medium, CVSS 4, published 7 Jul 2026) - [CVE-2026-6658: Jupyter nbconvert Cross-site Scripting in Mermaid HTML export](https://junglewise.ai/threats/cve-2026-6658-jupyter-nbconvert-cross-site-scripting-in-mermaid-html-export) (medium, CVSS 5.4, published 26 Jun 2026) - [CVE-2026-39378: nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding](https://junglewise.ai/threats/cve-2026-39378-nbconvert-has-an-arbitrary-file-read-via-path-traversal-in) (medium, CVSS 6.5, published 21 Apr 2026) - [CVE-2026-39377: nbconvert has an Arbitrary File Write via Path Traversal in Cell Attachment Filenames](https://junglewise.ai/threats/cve-2026-39377-nbconvert-has-an-arbitrary-file-write-via-path-traversal-in-cell) (medium, CVSS 6.5, published 21 Apr 2026) - [CVE-2021-32862: nbconvert vulnerable to cross-site scripting (XSS) via multiple exploit paths](https://junglewise.ai/threats/cve-2021-32862-nbconvert-vulnerable-to-cross-site-scripting-xss-via-multiple) (low, CVSS 3.1, published 18 Aug 2022) ## Most severe nbconvert (PyPI) vulnerabilities - [CVE-2026-114140: Jupyter nbconvert path traversal via output filename metadata](https://junglewise.ai/threats/cve-2026-114140-the-nbconvert-tool-jupyter-nbconvert-converts-jupyter-notebooks) (high, CVSS 4, published 21 Oct 2026) - [CVE-2026-39378: nbconvert has an Arbitrary File Read via Path Traversal in HTMLExporter Image Embedding](https://junglewise.ai/threats/cve-2026-39378-nbconvert-has-an-arbitrary-file-read-via-path-traversal-in) (medium, CVSS 6.5, published 21 Apr 2026) - [CVE-2026-39377: nbconvert has an Arbitrary File Write via Path Traversal in Cell Attachment Filenames](https://junglewise.ai/threats/cve-2026-39377-nbconvert-has-an-arbitrary-file-write-via-path-traversal-in-cell) (medium, CVSS 6.5, published 21 Apr 2026) - [CVE-2026-6658: Jupyter nbconvert Cross-site Scripting in Mermaid HTML export](https://junglewise.ai/threats/cve-2026-6658-jupyter-nbconvert-cross-site-scripting-in-mermaid-html-export) (medium, CVSS 5.4, published 26 Jun 2026) - [CVE-2025-53000: PYSEC-2026-1691 - nbconvert has an uncontrolled search path that leads to unauthorized code execution on Windows](https://junglewise.ai/threats/cve-2025-53000-nbconvert-has-an-uncontrolled-search-path-that-leads-to) (medium, CVSS 4, published 7 Jul 2026) - [CVE-2021-32862: nbconvert vulnerable to cross-site scripting (XSS) via multiple exploit paths](https://junglewise.ai/threats/cve-2021-32862-nbconvert-vulnerable-to-cross-site-scripting-xss-via-multiple) (low, CVSS 3.1, published 18 Aug 2022) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other PyPI technologies - [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities - [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities - [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities - [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities - [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities - [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities - [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities - [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities - [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities - [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities - [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities - [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "nbconvert (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/nbconvert, 13 November 2026.