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Vulnerability · Published Feb 6, 2026 · Assigned by VulDB

CVE-2026-1998micropython runtime.c mp_import_all memory corruption

Low 3.3

In plain English

A low-severity memory corruption in micropython. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.2%top 86.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13micropythonno fix listedDEBIAN-CVE-2026-1998
Debian:14micropythonno fix listedDEBIAN-CVE-2026-1998
Ubuntu:25.10micropythonno fix listedUBUNTU-CVE-2026-1998
Ubuntu:26.04:LTSmicropythonno fix listedUBUNTU-CVE-2026-1998
Ubuntu:26.10micropythonno fix listedUBUNTU-CVE-2026-1998

Affected products (as reported)

VendorProductVersions
n/a micropython 1.01.11.21.31.41.51.61.7

Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

References