# Protobufjs vulnerabilities

Source: https://junglewise.ai/threats/vendors/protobufjs  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/protobufjs.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in Protobufjs: 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-2026-54270, was published on 22 June 2026. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 6 (0 critical, 0 exploited in the wild)

## About Protobufjs

The maintainers of the protobuf.js JavaScript library for Protocol Buffers.

## Latest Protobufjs vulnerabilities

- [CVE-2026-54270: protobufjs memory amplification via unknown field preservation](https://junglewise.ai/threats/cve-2026-54270-protobufjs-memory-amplification-via-unknown-field-preservation) (medium, CVSS 5.3, published 22 Jun 2026)
- [CVE-2026-48712: protobufjs uncontrolled recursion in JSON conversion](https://junglewise.ai/threats/cve-2026-48712-protobufjs-uncontrolled-recursion-in-json-conversion) (high, CVSS 7.5, published 22 Jun 2026)
- [CVE-2026-44294: protobufjs denial of service via crafted field names in generated code](https://junglewise.ai/threats/cve-2026-44294-protobuf-js-denial-of-service-via-crafted-field-names) (medium, CVSS 5.3, published 13 May 2026)
- [CVE-2026-44293: protobufjs code injection in toObject function generation](https://junglewise.ai/threats/cve-2026-44293-protobufjs-code-injection-in-toobject-function-generation) (high, CVSS 8.8, published 13 May 2026)
- [CVE-2026-44289: protobufjs uncontrolled recursion in protobuf decoding](https://junglewise.ai/threats/cve-2026-44289-protobufjs-uncontrolled-recursion-in-protobuf-decoding) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-44288: protobufjs validation bypass via overlong UTF-8 sequences](https://junglewise.ai/threats/cve-2026-44288-protobufjs-validation-bypass-via-overlong-utf-8-sequences) (medium, CVSS 5.3, published 13 May 2026)

## Most severe Protobufjs vulnerabilities

- [CVE-2026-44293: protobufjs code injection in toObject function generation](https://junglewise.ai/threats/cve-2026-44293-protobufjs-code-injection-in-toobject-function-generation) (high, CVSS 8.8, published 13 May 2026)
- [CVE-2026-44289: protobufjs uncontrolled recursion in protobuf decoding](https://junglewise.ai/threats/cve-2026-44289-protobufjs-uncontrolled-recursion-in-protobuf-decoding) (high, CVSS 7.5, published 13 May 2026)
- [CVE-2026-48712: protobufjs uncontrolled recursion in JSON conversion](https://junglewise.ai/threats/cve-2026-48712-protobufjs-uncontrolled-recursion-in-json-conversion) (high, CVSS 7.5, published 22 Jun 2026)
- [CVE-2026-54270: protobufjs memory amplification via unknown field preservation](https://junglewise.ai/threats/cve-2026-54270-protobufjs-memory-amplification-via-unknown-field-preservation) (medium, CVSS 5.3, published 22 Jun 2026)
- [CVE-2026-44294: protobufjs denial of service via crafted field names in generated code](https://junglewise.ai/threats/cve-2026-44294-protobuf-js-denial-of-service-via-crafted-field-names) (medium, CVSS 5.3, published 13 May 2026)
- [CVE-2026-44288: protobufjs validation bypass via overlong UTF-8 sequences](https://junglewise.ai/threats/cve-2026-44288-protobufjs-validation-bypass-via-overlong-utf-8-sequences) (medium, CVSS 5.3, published 13 May 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 |

## Protobufjs technologies

- [Protobufjs Protobuf.js](https://junglewise.ai/threats/technologies/protobuf-js): 6 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, "Protobufjs vulnerabilities", https://junglewise.ai/threats/vendors/protobufjs, 9 November 2026.