CVE-2026-1998

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-119 CWE-787

Affected software

Vendor	Product	Versions
n/a	micropython	1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13; 1.14; 1.15; 1.16; 1.17; 1.18; 1.19

References

https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6Patch
https://github.com/micropython/micropython/Product
https://github.com/micropython/micropython/issues/18639Exploit, Issue Tracking
https://github.com/micropython/micropython/issues/18639#issue-3780651410Exploit, Issue Tracking
https://github.com/micropython/micropython/pull/18671Exploit, Issue Tracking
https://vuldb.com/?ctiid.344546Permissions Required, VDB Entry
https://vuldb.com/?id.344546Third Party Advisory, VDB Entry
https://vuldb.com/?submit.743396Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Feb 6, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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