Published Oct 27, 2026Sources checked Oct 28, 2026
7.3HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-116620 and is rated High severity with a CVSS score of 7.3. 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 28, 2026
Release Notes
CISA KEVNot listedBased on the latest collected catalog
EPSS0.3%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-116620?
A security vulnerability has been detected in Tencent RapidJSON up to 1.1.0. This issue affects the function GenericStringStream<UTF8<char>>::Take in the library include/rapidjson/stream.h of the component Regex Parser.
The manipulation leads to out-of-bounds read. The attack can be initiated remotely.
The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.