# Google Protobuf vulnerabilities

Source: https://junglewise.ai/threats/technologies/protobuf  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/protobuf.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Google Protobuf: 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-2026-54451, was published on 17 September 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 4 (0 critical, 0 exploited in the wild)

## About Google Protobuf

Protocol buffer library and serialization format for structured data developed by Google.

## Latest Google Protobuf vulnerabilities

- [CVE-2026-54451: Elixir Protobuf uncontrolled recursion in decoder](https://junglewise.ai/threats/cve-2026-54451-elixir-protobuf-uncontrolled-recursion-in-decoder) (high, CVSS 8.2, published 17 Sep 2026)
- [CVE-2026-6409: Google Protobuf DoS via negative varints or deep recursion in PHP](https://junglewise.ai/threats/cve-2026-6409-google-protobuf-dos-via-negative-varints-or-deep-recursion-in-php) (high, CVSS 4, published 16 Apr 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)

## Most severe Google Protobuf 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-2026-54451: Elixir Protobuf uncontrolled recursion in decoder](https://junglewise.ai/threats/cve-2026-54451-elixir-protobuf-uncontrolled-recursion-in-decoder) (high, CVSS 8.2, published 17 Sep 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-2026-6409: Google Protobuf DoS via negative varints or deep recursion in PHP](https://junglewise.ai/threats/cve-2026-6409-google-protobuf-dos-via-negative-varints-or-deep-recursion-in-php) (high, CVSS 4, published 16 Apr 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability 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 | 1 | 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 Google technologies

- [Google Chrome](https://junglewise.ai/threats/technologies/chrome): 3,930 vulnerabilities
- [Google Android](https://junglewise.ai/threats/technologies/android): 628 vulnerabilities
- [Google Chrome for iOS](https://junglewise.ai/threats/technologies/chrome-for-ios): 79 vulnerabilities
- [Google Pixel](https://junglewise.ai/threats/technologies/google-pixel): 72 vulnerabilities
- [Google Cloud Platform](https://junglewise.ai/threats/technologies/google-cloud-platform): 43 vulnerabilities
- [Google Chromium V8](https://junglewise.ai/threats/technologies/chromium-v8): 41 vulnerabilities
- [Google Chromium](https://junglewise.ai/threats/technologies/chromium): 37 vulnerabilities
- [Google TensorFlow](https://junglewise.ai/threats/technologies/tensorflow): 31 vulnerabilities
- [Google Pixel Devices](https://junglewise.ai/threats/technologies/pixel-devices): 27 vulnerabilities
- [Google Pixel Firmware](https://junglewise.ai/threats/technologies/pixel-firmware): 27 vulnerabilities
- [Google Android Framework](https://junglewise.ai/threats/technologies/android-framework): 22 vulnerabilities
- [Google Chrome for Android](https://junglewise.ai/threats/technologies/chrome-for-android): 21 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, "Google Protobuf vulnerabilities", https://junglewise.ai/threats/technologies/protobuf, 12 November 2026.