CVE-2026-1998CWE-119

micropython runtime.c mp_import_all memory corruption

Medium · published February 6, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
12.9
In the wild
Unconfirmed
What it is

A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00228 · 12.9th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-02-06T06:02Z
EPSS history
Timeline
  • 06 FEB 06:02Z
    micropython runtime.c mp_import_all memory corruption
    cvelistv5