# Python Software Foundation CPython vulnerabilities

Source: https://junglewise.ai/threats/technologies/cpython  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 10 November 2026, 18:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/cpython.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 28 vulnerabilities in Python Software Foundation CPython: 1 in the last 7 days and 1 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-115791, was published on 10 November 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 1
- Last 30 days: 1
- Last 90 days: 1
- All time: 28 (1 critical, 0 exploited in the wild)

## About Python Software Foundation CPython

Reference implementation of the Python programming language interpreter written in C.

## Latest Python Software Foundation CPython vulnerabilities

- [CVE-2026-115791: Python gzip/tarfile/zipfile CLI module shadowing via sys.path](https://junglewise.ai/threats/cve-2026-115791-when-tarfile-or-zipfile-command-line-interface-cli-is-used-to) (info, published 10 Nov 2026)
- [CVE-2026-6879: Python CPython quadratic complexity in xml.etree XPath index predicates](https://junglewise.ai/threats/cve-2026-6879-python-cpython-quadratic-complexity-in-xml-etree-xpath-index) (info, CVSS 2, published 28 Jul 2026)
- [CVE-2026-15308: Python CPython CPU denial of service in html.parser.HTMLParser](https://junglewise.ai/threats/cve-2026-15308-python-cpython-cpu-denial-of-service-in-html-parser-htmlparser) (info, CVSS 10, published 9 Jul 2026)
- [CVE-2026-4360: Python CPython improper permission preservation in tarfile.extract](https://junglewise.ai/threats/cve-2026-4360-python-cpython-improper-permission-preservation-in-tarfile-extract) (info, CVSS 2, published 30 Jun 2026)
- [CVE-2026-11972: Python CPython infinite loop in tarfile streaming mode](https://junglewise.ai/threats/cve-2026-11972-python-cpython-infinite-loop-in-tarfile-streaming-mode) (info, CVSS 8.2, published 23 Jun 2026)
- [CVE-2026-0864: Python CPython configuration injection in configparser](https://junglewise.ai/threats/cve-2026-0864-python-cpython-configuration-injection-in-configparser) (info, CVSS 4.1, published 23 Jun 2026)
- [CVE-2026-11940: Python CPython path traversal bypass in tarfile.extractall](https://junglewise.ai/threats/cve-2026-11940-python-cpython-path-traversal-bypass-in-tarfile-extractall) (info, CVSS 7.8, published 23 Jun 2026)
- [CVE-2026-12003: Python uncontrolled search path in Windows VPATH landmark detection](https://junglewise.ai/threats/cve-2026-12003-python-uncontrolled-search-path-in-windows-vpath-landmark) (info, CVSS 5.3, published 16 Jun 2026)
- [CVE-2026-9669: Python CPython stack buffer overflow in bz2.BZ2Decompressor reuse](https://junglewise.ai/threats/cve-2026-9669-python-cpython-stack-buffer-overflow-in-bz2-bz2decompressor-reuse) (info, CVSS 8.2, published 8 Jun 2026)
- [CVE-2026-7774: Python CPython path traversal bypass in tarfile.data_filter](https://junglewise.ai/threats/cve-2026-7774-python-cpython-path-traversal-bypass-in-tarfile-data-filter) (info, CVSS 6.9, published 4 Jun 2026)
- [CVE-2026-3276: Python CPython denial of service in unicodedata.normalize](https://junglewise.ai/threats/cve-2026-3276-python-cpython-denial-of-service-in-unicodedata-normalize) (info, CVSS 6.3, published 3 Jun 2026)
- [CVE-2026-8328: Python CPython SSRF in ftplib.ftpcp function](https://junglewise.ai/threats/cve-2026-8328-python-cpython-ssrf-in-ftplib-ftpcp-function) (info, CVSS 5.9, published 13 May 2026)
- [CVE-2026-7210: Python CPython denial of service in XML parsers](https://junglewise.ai/threats/cve-2026-7210-python-cpython-denial-of-service-in-xml-parsers) (critical, CVSS 9.8, published 11 May 2026)
- [CVE-2026-3087: Python shutil path traversal in ZIP extraction on Windows](https://junglewise.ai/threats/cve-2026-3087-python-shutil-path-traversal-in-zip-extraction-on-windows) (high, CVSS 7.5, published 27 Apr 2026)
- [CVE-2026-6019: Python CPython HTML injection in http.cookies.Morsel.js_output](https://junglewise.ai/threats/cve-2026-6019-python-cpython-html-injection-in-http-cookies-morsel-js-output) (medium, CVSS 6.1, published 22 Apr 2026)
- [CVE-2026-3298: Python CPython out-of-bounds write in asyncio sock_recvfrom_into on Windows](https://junglewise.ai/threats/cve-2026-3298-python-cpython-out-of-bounds-write-in-asyncio-sock-recvfrom-into) (info, CVSS 8.8, published 21 Apr 2026)
- [CVE-2026-5713: Python CPython out-of-bounds read/write in remote debugging](https://junglewise.ai/threats/cve-2026-5713-python-cpython-out-of-bounds-read-write-in-remote-debugging) (info, CVSS 5.3, published 14 Apr 2026)
- [CVE-2026-4786: Python CPython command injection bypass in webbrowser module](https://junglewise.ai/threats/cve-2026-4786-python-cpython-command-injection-bypass-in-webbrowser-module) (high, CVSS 7.1, published 13 Apr 2026)
- [CVE-2026-6100: Python CPython use-after-free in decompression modules](https://junglewise.ai/threats/cve-2026-6100-python-cpython-use-after-free-in-decompression-modules) (high, CVSS 8.1, published 13 Apr 2026)
- [CVE-2026-1502: Python CPython CRLF injection in HTTP client proxy tunnel headers](https://junglewise.ai/threats/cve-2026-1502-python-cpython-crlf-injection-in-http-client-proxy-tunnel-headers) (info, CVSS 5.7, published 10 Apr 2026)
- [CVE-2026-4519: Python CPython argument injection in webbrowser.open](https://junglewise.ai/threats/cve-2026-4519-python-cpython-argument-injection-in-webbrowser-open) (low, CVSS 3.3, published 20 Mar 2026)
- [CVE-2026-4224: Python pyexpat stack overflow in conv_content_model](https://junglewise.ai/threats/cve-2026-4224-python-pyexpat-stack-overflow-in-conv-content-model) (high, CVSS 7.5, published 16 Mar 2026)
- [CVE-2025-13462: Python CPython tarfile misinterpretation via GNU long name normalization](https://junglewise.ai/threats/cve-2025-13462-python-cpython-tarfile-misinterpretation-via-gnu-long-name) (info, CVSS 2, published 12 Mar 2026)
- [CVE-2025-15366: Python CPython command injection in imaplib](https://junglewise.ai/threats/cve-2025-15366-python-cpython-command-injection-in-imaplib) (info, CVSS 5.9, published 20 Jan 2026)
- [CVE-2025-13836: Python http.client denial of service via large Content-Length header](https://junglewise.ai/threats/cve-2025-13836-python-http-client-denial-of-service-via-large-content-length) (high, CVSS 7.5, published 1 Dec 2025)

## Most severe Python Software Foundation CPython vulnerabilities

- [CVE-2026-7210: Python CPython denial of service in XML parsers](https://junglewise.ai/threats/cve-2026-7210-python-cpython-denial-of-service-in-xml-parsers) (critical, CVSS 9.8, published 11 May 2026)
- [CVE-2026-6100: Python CPython use-after-free in decompression modules](https://junglewise.ai/threats/cve-2026-6100-python-cpython-use-after-free-in-decompression-modules) (high, CVSS 8.1, published 13 Apr 2026)
- [CVE-2025-13836: Python http.client denial of service via large Content-Length header](https://junglewise.ai/threats/cve-2025-13836-python-http-client-denial-of-service-via-large-content-length) (high, CVSS 7.5, published 1 Dec 2025)
- [CVE-2026-3087: Python shutil path traversal in ZIP extraction on Windows](https://junglewise.ai/threats/cve-2026-3087-python-shutil-path-traversal-in-zip-extraction-on-windows) (high, CVSS 7.5, published 27 Apr 2026)
- [CVE-2026-4224: Python pyexpat stack overflow in conv_content_model](https://junglewise.ai/threats/cve-2026-4224-python-pyexpat-stack-overflow-in-conv-content-model) (high, CVSS 7.5, published 16 Mar 2026)
- [CVE-2026-4786: Python CPython command injection bypass in webbrowser module](https://junglewise.ai/threats/cve-2026-4786-python-cpython-command-injection-bypass-in-webbrowser-module) (high, CVSS 7.1, published 13 Apr 2026)
- [CVE-2026-6019: Python CPython HTML injection in http.cookies.Morsel.js_output](https://junglewise.ai/threats/cve-2026-6019-python-cpython-html-injection-in-http-cookies-morsel-js-output) (medium, CVSS 6.1, published 22 Apr 2026)
- [CVE-2025-6075: Python CPython quadratic complexity in os.path.expandvars](https://junglewise.ai/threats/cve-2025-6075-python-cpython-quadratic-complexity-in-os-path-expandvars) (medium, CVSS 5.5, published 31 Oct 2025)
- [CVE-2023-27043: Python email module incorrect parsing in email.utils.parseaddr](https://junglewise.ai/threats/cve-2023-27043-python-email-module-incorrect-parsing-in-email-utils-parseaddr) (medium, CVSS 5.3, published 19 Apr 2023)
- [CVE-2025-8291: Python CPython improper offset validation in zipfile module](https://junglewise.ai/threats/cve-2025-8291-python-cpython-improper-offset-validation-in-zipfile-module) (medium, CVSS 4.3, published 7 Oct 2025)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 1 | 0 | 0 |

## 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, "Python Software Foundation CPython vulnerabilities", https://junglewise.ai/threats/technologies/cpython, 10 November 2026.