A flaw has been found in micropython up to 1.27.0. This... · CVE-2026-1998 · GitHub Advisory Database · GitHub

A flaw has been found in micropython up to 1.27.0. This...

Moderate severity Unreviewed Published Feb 6, 2026 to the GitHub Advisory Database • Updated Feb 17, 2026

Package

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Affected versions

Unknown

Patched versions

Unknown

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.

References

Published by the National Vulnerability Database

Feb 6, 2026

Published to the GitHub Advisory Database Feb 6, 2026

Last updated Feb 17, 2026

Weaknesses

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. Learn more on MITRE.

CWE-787

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer. Learn more on MITRE.