Overview
What is CVE-2026-72522?
libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.
CVE intelligence
CVE-2026-72522
Vulnerability intelligence
6.2MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-72522 and is rated Medium severity with a CVSS score of 6.2. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
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