CVE-2026-32777
Apache libexpat DTD Infinite Loop Vulnerability
Description
libexpat before 2.7.5 allows an infinite loop while parsing DTD content.
INFO
Published Date :
March 16, 2026, 2:19 p.m.
Last Modified :
March 17, 2026, 3:52 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update libexpat to version 2.7.5 or later.
- Recompile affected applications.
- Test applications for stability.
Public PoC/Exploit Available at Github
CVE-2026-32777 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-32777.
| URL | Resource |
|---|---|
| https://github.com/libexpat/libexpat/issues/1161 | Exploit Issue Tracking Vendor Advisory |
| https://github.com/libexpat/libexpat/pull/1159 | Issue Tracking Patch |
| https://github.com/libexpat/libexpat/pull/1162 | Issue Tracking Patch |
| https://issues.oss-fuzz.com/issues/486993411 | Permissions Required |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-32777 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-32777
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
HTML CSS JavaScript Dockerfile
None
Dockerfile Python CSS JavaScript HTML Shell
None
Dockerfile Python CSS JavaScript HTML Shell
None
Dockerfile Python CSS JavaScript HTML Shell
A powerful Discord bot and web interface to manage Docker containers remotely. This application bridges the gap between Discord and your Docker environment, allowing container monitoring and control directly through Discord channels.
Dockerfile Python HTML Shell JavaScript CSS
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-32777 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-32777 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.5 Added Reference Type MITRE: https://github.com/libexpat/libexpat/issues/1161 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type MITRE: https://github.com/libexpat/libexpat/pull/1159 Types: Issue Tracking, Patch Added Reference Type MITRE: https://github.com/libexpat/libexpat/pull/1162 Types: Issue Tracking, Patch Added Reference Type MITRE: https://issues.oss-fuzz.com/issues/486993411 Types: Permissions Required -
New CVE Received by [email protected]
Mar. 16, 2026
Action Type Old Value New Value Added Description libexpat before 2.7.5 allows an infinite loop while parsing DTD content. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-835 Added Reference https://github.com/libexpat/libexpat/issues/1161 Added Reference https://github.com/libexpat/libexpat/pull/1159 Added Reference https://github.com/libexpat/libexpat/pull/1162 Added Reference https://issues.oss-fuzz.com/issues/486993411