# protobuf (PyPI) vulnerabilities

Source: https://junglewise.ai/threats/technologies/pypi-protobuf  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/pypi-protobuf.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in protobuf (PyPI): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2025-4565, was published on 7 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 5 (0 critical, 0 exploited in the wild)

## About protobuf (PyPI)

Protocol Buffers (protobuf) is a method for serializing structured data developed by Google.

## Latest protobuf (PyPI) vulnerabilities

- [CVE-2025-4565: PYSEC-2026-1806 - protobuf-python has a potential Denial of Service issue](https://junglewise.ai/threats/cve-2025-4565-protobuf-python-has-a-potential-denial-of-service-issue) (medium, CVSS 4, published 7 Jul 2026)
- [CVE-2022-1941: PYSEC-2026-899 - protobuf-cpp and protobuf-python have potential Denial of Service issue](https://junglewise.ai/threats/cve-2022-1941-protobuf-cpp-and-protobuf-python-have-potential-denial-of-service) (low, CVSS 3.1, published 7 Jul 2026)
- [CVE-2026-0994: Google Protobuf denial of service in Python json_format.ParseDict](https://junglewise.ai/threats/cve-2026-0994-google-protobuf-denial-of-service-in-python-json-format-parsedict) (high, CVSS 7.5, published 23 Jan 2026)
- [CVE-2015-5237: Google Protobuf heap buffer overflow](https://junglewise.ai/threats/cve-2015-5237-google-protobuf-heap-buffer-overflow) (high, CVSS 8.8, published 13 May 2022)
- [CVE-2021-22570: Withdrawn Advisory: NULL Pointer Dereference in Protocol Buffers](https://junglewise.ai/threats/cve-2021-22570-withdrawn-advisory-null-pointer-dereference-in-protocol-buffers) (low, CVSS 3.1, published 26 Jan 2022)

## Most severe protobuf (PyPI) vulnerabilities

- [CVE-2015-5237: Google Protobuf heap buffer overflow](https://junglewise.ai/threats/cve-2015-5237-google-protobuf-heap-buffer-overflow) (high, CVSS 8.8, published 13 May 2022)
- [CVE-2026-0994: Google Protobuf denial of service in Python json_format.ParseDict](https://junglewise.ai/threats/cve-2026-0994-google-protobuf-denial-of-service-in-python-json-format-parsedict) (high, CVSS 7.5, published 23 Jan 2026)
- [CVE-2025-4565: PYSEC-2026-1806 - protobuf-python has a potential Denial of Service issue](https://junglewise.ai/threats/cve-2025-4565-protobuf-python-has-a-potential-denial-of-service-issue) (medium, CVSS 4, published 7 Jul 2026)
- [CVE-2021-22570: Withdrawn Advisory: NULL Pointer Dereference in Protocol Buffers](https://junglewise.ai/threats/cve-2021-22570-withdrawn-advisory-null-pointer-dereference-in-protocol-buffers) (low, CVSS 3.1, published 26 Jan 2022)
- [CVE-2022-1941: PYSEC-2026-899 - protobuf-cpp and protobuf-python have potential Denial of Service issue](https://junglewise.ai/threats/cve-2022-1941-protobuf-cpp-and-protobuf-python-have-potential-denial-of-service) (low, CVSS 3.1, published 7 Jul 2026)

## 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 | 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, "protobuf (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-protobuf, 13 November 2026.