CVE-2026-32777 — Infinite Loop in Project Libexpat

CWE-835 — Infinite Loop8 documents8 sources
Severity
5.5MEDIUMNVD
CNA4.0
EPSS
0.0%
top 98.34%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Libexpat Project Libexpat
Timeline
PublishedMar 16

Description

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

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages2 packages

▶CVEListV5libexpat_project/libexpat< 2.7.5

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
CVEList
CVE-2026-32777: libexpat before 2↗2026-03-16
▶
GHSA
GHSA-9rpf-mhcj-gv7r: libexpat before 2↗2026-03-16
▶
OSV
CVE-2026-32777: libexpat before 2↗2026-03-16
▶

📋Vendor Advisories

3
Red Hat
libexpat: libexpat: Denial of Service via infinite loop in DTD content parsing↗2026-03-16
▶
Microsoft
CVE-2026-32777: Mariner: Mariner mitre: mitre Customer Action Required: Yes↗2026-03-10
▶
Debian
CVE-2026-32777: expat - libexpat before 2.7.5 allows an infinite loop while parsing DTD content.↗2026
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-32777 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-32777 — Infinite Loop in Project Libexpat | cvebase