Memory Corruption in Micropython Affects Functionality
CVE-2026-1998

4.8MEDIUM

Key Information:

Vendor

MicroPython

Status
Micropython
Vendor
CVE Published:
6 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1998?

A vulnerability exists in MicroPython due to a flaw in the mp_import_all function located in py/runtime.c, which can lead to memory corruption. This issue requires local access for exploitation and has already been published. Users are advised to apply the available patch (commit 570744d06c5ba9dba59b4c3f432ca4f0abd396b6) to remediate this vulnerability and secure their installations.

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Affected Version(s)

micropython 1.0

micropython 1.1

micropython 1.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1998 - Proof of Concept

References

https://vuldb.com/?id.344546
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344546
signaturepermissions-required
https://vuldb.com/?submit.743396
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oneafter (VulDB User)
JSON
.