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CVE-2026-32777

libexpat: libexpat: Denial of Service via infinite loop in DTD content parsing

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Severity

Moderate

Red Hat Product Security

4

CVSS 3.1

Review impact separately from score.

Published · March 16, 2026

Updated · September 28, 2026

Description

A flaw was found in libexpat. A remote attacker could exploit this vulnerability by providing specially crafted Document Type Definition (DTD) content. This could lead to an infinite loop during parsing, resulting in a Denial of Service (DoS) for the application using libexpat.

Statement

This MODERATE impact flaw in libexpat can lead to a denial of service when processing specially crafted Document Type Definition (DTD) content, causing an infinite loop during parsing.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')