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CVE-2026-1998VulnerabilityPublished Updated

SUSE · Security update for micropython

Affects SUSESource GCVE Database

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Authoritative record:CVE-2026-1998· Medium 4.8

Public exploit available · CVSS 4.8 Medium.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
micropythonAffected
  • 1.0 – 1.27.0
28 affected builds
Fixed in–
GitHubmicropython/micropythonpkg:github/micropython/micropythonOther threatsAffected
  • 1.0 – 1.27.0
28 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the official MicroPython update that fixes CVE-2026-1998. The update is available in version 1.26.1 and includes the fix for the segmentation fault. No additional mitigation is indicated.

Description

A security update for MicroPython addresses a segmentation fault vulnerability (CVE-2026-1998) in the function mp_map_lookup triggered via mp_import_all. The update also includes various component updates and fixes unrelated to the vulnerability. No CVSS score is provided, but the issue is assessed as low severity.

References

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