VULNERABILITY INTELLIGENCE

CVE-2026-88390

CVSS score7.7 HIGH
EPSS probability0.17%
CISA KEVNot currently listed
Published2026-09-24
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Description

An out-of-bounds write vulnerability in jslGetTokenValueAsString() in Espruino 2v29 (commit bffc6d0) allows crafted JavaScript input containing an overlong token to trigger a one-byte write beyond the JsLex.token buffer in RELEASE/NO_ASSERT builds. The out-of-bounds write corrupts the adjacent tokenValue pointer, resulting in memory corruption and potentially causing application crashes or denial of service.

Weakness classification

  • CWE-787: Out-of-bounds Write

Primary references