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CVE WatchSep 25, 2026

CVE-2026-88388

Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-

CVSS

7.5

High

EPSS

0.2%

p6

KEV

—

Exploit Today

2

0-100

Published: Sep 24, 2026 · Last modified: Sep 25, 2026 · CWE-121

EPSS · 30d

Not enough EPSS history yet.

Technical description

Espruino 2v29 (commit bffc6d0) contains a stack-based buffer overflow vulnerability in the JavaScript error stack-trace handling path on 64-bit builds. A remote attacker can supply JavaScript input that triggers an exception and reaches jslPrintTokenLineMarker(), which passes the address of a 4-byte int column variable to jsvGetLineAndCol() as a size_t pointer. jsvGetLineAndCol() performs an 8-byte write through the mismatched pointer, overwriting adjacent stack memory.

Official references
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