VDB
CVE-2026-1998
CVE-2026-1998
PUBLISHED
CVSS 4.800000190734863 MEDIUM
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.
EPSS 0.23% · 13.5th percentile
Risk Scores
CVSS 4.0
4.800000190734863
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS Score
0.23%
13.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| micropython | micropython | 0, 0 |
| n/a | micropython | 1.13, 1.14, 1.16 |
Timeline
- Feb 6, 2026 CVE Published
- Feb 6, 2026 EPSS Score
- Feb 9, 2026 EPSS Score
- Feb 11, 2026 EPSS Score
- Feb 14, 2026 EPSS Score
- Feb 17, 2026 EPSS Score
- Feb 19, 2026 EPSS Score
- Feb 22, 2026 EPSS Score
- Feb 23, 2026 CVE Updated
- Feb 25, 2026 EPSS Score
- Feb 28, 2026 EPSS Score
- Mar 2, 2026 EPSS Score
References
- https://github.com/micropython/micropython/issues/18639 discussion
- https://github.com/micropython/micropython/issues/18639#issue-3780651410 discussion
- VDB-344546 | CTI Indicators (IOB, IOC, IOA) url
- https://github.com/micropython/micropython url
- https://github.com/micropython/micropython/ vendor
- https://vuldb.com/?id.344546 advisory
- https://github.com/micropython/micropython/pull/18671 fix
- https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6 fix
- Submit #743396 | micropython 0fd0843 Memory Corruption third-party-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-1998 advisory