Published Oct 21, 2026Sources checked Oct 23, 2026
N/ACVSS not listedScore unavailable
What this means
Review the available evidence
CVE-2026-111943. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Oct 23, 2026
Release Notes
CISA KEVNot listedBased on the latest collected catalog
EPSS0.1%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-111943?
On most platforms, Go uses the given system root certificates. However, in some narrower cases, the system trust stores may not be updated without further action.
To defend against the narrower set of cases that may remain affected, a denylist was added in crypto/x509 to return an error when calling Verify with any of the known intermediate certificates that are no longer considered to be trustworthy.