CVE-2026-88389CWE-476

CVE-2026-88389

Medium · published September 25, 2026

CVSS v3.1
6.2
EPSS
0%
Percentile
1.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.2 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00112 · 1.3th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-09-25T19:17Z
References (3)
https://github.com/espruino/Espruino/commit/0db0663ac5201a6fea68094b45da673edec45187 · [email protected]https://github.com/espruino/Espruino/issues/2745 · [email protected]https://github.com/espruino/Espruino/issues/2745 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 27 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 25 SEP 00:00Z
    Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c
    cvelistv5