# Espruino vulnerabilities

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

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Espruino: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-88389, was published on 25 September 2026. Nothing in the last four weeks, down from 3 vulnerabilities in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 3
- All time: 3 (0 critical, 0 exploited in the wild)

## About Espruino

JavaScript runtime platform for embedded systems and microcontrollers.

## Latest Espruino vulnerabilities

- [CVE-2026-88389: Espruino NULL pointer dereference in jslGetRawString](https://junglewise.ai/threats/cve-2026-88389-espruino-2v29-commit-bffc6d0-contains-a-null-pointer-dereference) (info, published 25 Sep 2026)
- [CVE-2026-88388: Espruino stack-based buffer overflow in error stack-trace handling](https://junglewise.ai/threats/cve-2026-88388-espruino-2v29-commit-bffc6d0-contains-a-stack-based-buffer) (high, CVSS 7.5, published 24 Sep 2026)
- [CVE-2026-88390: Espruino out-of-bounds write in jslGetTokenValueAsString](https://junglewise.ai/threats/cve-2026-88390-an-out-of-bounds-write-vulnerability-in-jslgettokenvalueasstring) (high, CVSS 7.7, published 24 Sep 2026)

## Most severe Espruino vulnerabilities

- [CVE-2026-88390: Espruino out-of-bounds write in jslGetTokenValueAsString](https://junglewise.ai/threats/cve-2026-88390-an-out-of-bounds-write-vulnerability-in-jslgettokenvalueasstring) (high, CVSS 7.7, published 24 Sep 2026)
- [CVE-2026-88388: Espruino stack-based buffer overflow in error stack-trace handling](https://junglewise.ai/threats/cve-2026-88388-espruino-2v29-commit-bffc6d0-contains-a-stack-based-buffer) (high, CVSS 7.5, published 24 Sep 2026)
- [CVE-2026-88389: Espruino NULL pointer dereference in jslGetRawString](https://junglewise.ai/threats/cve-2026-88389-espruino-2v29-commit-bffc6d0-contains-a-null-pointer-dereference) (info, published 25 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 3 vulnerabilities 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 | 0 | 0 | 0 |
| 21 Sep 2026 | 3 | 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 |

## Espruino technologies

- [Espruino](https://junglewise.ai/threats/technologies/espruino): 3 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, "Espruino vulnerabilities", https://junglewise.ai/threats/vendors/espruino, 9 November 2026.