Microsoft Security Response Center guidance
Vendor revision: Sep 24, 2026Release Notes
Overview
What is CVE-2026-33818?
Enforce a recursion limit in Unmarshal to prevent stack exhaustion when parsing deeply-nested, recursive structures.
Source: NVD
CVE intelligence
CVE-2026-33818
Vulnerability intelligence
7.5HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-33818 and is rated High severity with a CVSS score of 7.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
Remediation and response
CISA KEVNot listedBased on the latest collected catalog
EPSS0.6%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships