HOMEVULNERABILITIESCVE-2026-1998
MEDIUM

CVE-2026-1998

CWE-119Published: February 6, 2026· Updated: Jun 17, 2026

5.5
CVSS v3.1

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.

NVD Source

Technical Analysis

CVE-2026-1998 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

micropython1 product(s)
micropython
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6
ADVISORYhttps://vuldb.com/?id.344546
ADVISORYhttps://vuldb.com/?submit.743396

All References (8)

→
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

Quick Facts

CVE IDCVE-2026-1998
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-119
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 6, 2026

Related CVEs (CWE-119)

CVE-2007-6204
10.0
CVE-2014-3791
10.0
CVE-2008-0443
10.0
CVE-2008-4779
10.0
CVE-2014-2994
10.0
CVE-2011-3142
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-1998 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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