CVE-2026-1998A flaw has been found in micropython up to 1.27.0.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-119, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
micropython micropython micropython:micropython | through 1.27.0 | NVD |
References
- 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
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.