CVE-2026-72522

DiscoveredAug 10, 2026UpdatedOct 24, 2026

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.

View graph Watch Export

CVSS v3.1

6.2 MEDIUM

EPSS

0.19%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

Intelligence Reports1

1 intelligence report available

Curated threat research and citations from CrowdStrike, Mandiant, Microsoft, and other sources — unlock with Premium.

Upgrade to Premium

EPSS Trend

Aug 14, 2026 → Sep 28, 2026

▲ 0.01pp

0.18% → 0.19% over 4 tracked changes

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityNONE

AvailabilityHIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Connections

2 relationships

CWE-125

source

Timeline

disclosure → media coverage

Aug 10, 2026

Disclosure — published as a CVE record. · last revised by NVD Oct 24, 2026

Sep 24, 2026

ubuntu.com reports: USN-8813-1: Expat vulnerabilities