What is CVE-2026-72522?

CVE-2026-72522 is a medium-severity vulnerability in Libexpat Project, classified under Out-of-bounds Read. CVSS score: 6.2/10. Published 2026-08-10.

How severe is CVE-2026-72522?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Out-of-bounds Read in Libexpat Project

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.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Libexpat Project — versions 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-72522?: CVE-2026-72522 is a medium-severity vulnerability in Libexpat Project, classified under Out-of-bounds Read. CVSS score: 6.2/10. Published 2026-08-10.
How severe is CVE-2026-72522?: Medium severity. CVSS v3 base score is 6.2 out of 10.