Low 3.3Published Feb 6, 2026

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

Updated under an hour ago (Oct 25, 2026, 10:23 PM ET)

Does this affect you?

It affects n/a micropython. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for n/a micropython

Exploited in the last 30 days

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.

CVSS: 3.3 LOW (v3.1, CNA)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
Weakness (CWE): CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Analyzed
Record last updated: Feb 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a micropython micropython:micropython	1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; and 20 more ranges	CNA record
micropython micropython micropython:micropython	through 1.27.0	NVD

References

https://vuldb.com/?id.344546vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.344546signature, permissions-required, vdb-entry
https://vuldb.com/?submit.743396third-party-advisory, exploit, vdb-entry
https://github.com/micropython/micropython/issues/18639issue-tracking, exploit
https://github.com/micropython/micropython/pull/18671issue-tracking, exploit
https://github.com/micropython/micropython/issues/18639#issue-3780651410exploit, issue-tracking
https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6patch
https://github.com/micropython/micropython/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.