CVE-2026-1998
micropython runtime.c mp_import_all memory corruption
LOW 1.9EPSS 0.2%
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.
- Affected
- micropython
- CVSS v4.0 VULDB
- 1.9 LOW
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 NVD
- 5.5 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS v3.1 VULDB
- 3.3 LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - CVSS v2.0 VULDB
- 1.7 LOW
AV:L/AC:L/Au:S/C:N/I:N/A:P - EPSS
- 0.23% chance of exploitation in the next 30 days, 13th percentile
- Published
- 2026-02-06
- Updated
- 2026-02-23
Proof-of-concept exploits (1)
- micropython/micropython/issues/18639#issue-378065141022128★ · 2026-10-15
Security advisories
- https://vuldb.com/?id.344546
- https://vuldb.com/?submit.743396
- dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6
- micropython/micropython/pull/18671