---
id: CVE-2026-88389
title: >-
  Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference
  vulnerability in jslGetRawString() in src/jslex.c
summary: >-
  Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference
  vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string
  input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In
  RELEASE/NO_ASS…
severity: none
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T15:17:56.687'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88389'
references:
  - url: >-
      https://github.com/espruino/Espruino/commit/0db0663ac5201a6fea68094b45da673edec45187
    label: cve@mitre.org
  - url: 'https://github.com/espruino/Espruino/issues/2745'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T15:10:56.370Z'
---

## Overview

Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In RELEASE/NO_ASSERT builds, the missing assertion guard allows a write through the NULL pointer, resulting in memory corruption and application termination or denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.