CVE-2026-1998

1.9 LOW 0.2% exploit odds Fix listed Memory safety

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.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account. Limited direct impact.
Exploit odds: 0.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-02-06 07:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 10:16 UTC Last updatedMost recent change to the record

Details

Published: 2026-02-06 07:16 UTC
Last modified: 2026-06-17 10:16 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-119 · Buffer errors
Record status: Analyzed

Affected

Micropython ≤ 1.27.0

Attack profile CVSS 4.0 · 1.9

Attack vector: Local
Complexity: Low
Attack requirements: None
Privileges needed: Low
User interaction: None
Confidentiality: None
Integrity: None
Availability: Low

Raw 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/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

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Fix and advisories

References

NVD record · CVE.org record