CVE-2026-1998

Name: CVE-2026-1998
Creator: NVD / NIST
Published: 2026-02-06T07:16:12.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 1.9/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-1998 is a low-severity vulnerability rated 1.9/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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

5.5/10

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

CVSS 4.0

1.9/10

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

EPSS Probability

0.20%

10.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Micropython	Micropython	<= 1.27.0

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
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1998?

How severe is CVE-2026-1998?

CVE-2026-1998 has a CVSS score of 1.9/10 (LOW severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1998?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1998?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST