Is CVE-2026-40556 in the CISA KEV catalog?

No. CVE-2026-40556 is not currently on the CISA Known Exploited Vulnerabilities list.

How do I fix CVE-2026-40556?

Upgrade nano on debian unstable to 9.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-40556

UNSCORED

NVD

Description

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

How to fix

Remediation Available

nanoDebian

Fixed in:9.0-1CVE-2026-40556

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

EPSS data unavailable for this CVE.

Embed a live status badge for CVE-2026-40556

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.