What is CVE-2026-32777?

CVE-2026-32777 is a medium-severity vulnerability in Libexpat Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 4.0/10. Published 2026-03-16.

How severe is CVE-2026-32777?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Vulnerability in Libexpat Project

CVE-2026-32777

libexpat before 2.7.5 allows an infinite loop while parsing DTD content.

EPSS: 0.000 (0.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Libexpat Project — versions 0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

github.com/libexpat/libexpat/pull/1159
github.com/libexpat/libexpat/issues/1161
github.com/libexpat/libexpat/pull/1162
issues.oss-fuzz.com/issues/486993411

Frequently asked questions

What is CVE-2026-32777?: CVE-2026-32777 is a medium-severity vulnerability in Libexpat Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 4.0/10. Published 2026-03-16.
How severe is CVE-2026-32777?: Medium severity. CVSS v3 base score is 4.0 out of 10.