CVE intelligence

CVE-2026-103111

Vulnerability intelligence

Published Sep 30, 2026Sources checked Oct 3, 2026

7.6HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-103111 and is rated High severity with a CVSS score of 7.6. 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

Release Notes

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-103111?

PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.