Is CVE-2019-15903 actively exploited?

CVE-2019-15903 has no public evidence of in-the-wild exploitation as of 2025-05-30.

What is the CVSS score for CVE-2019-15903?

CVE-2019-15903 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2019-15903?

Patch guidance is available from libexpat project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2019-15903.

Fix CVE-2019-15903 - HIGH libexpat project libexpat

Q: Which products are affected by CVE-2019-15903?

5 products: libexpat project libexpat, python python, python python, python python, python python.

Description

In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-125 · Out-of-bounds Read CWE-776 CWE-125 · Out-of-bounds Read

Metadata

Primary Vendor: LIBEXPAT_PROJECT
Published: 9/4/2019
Last Modified: 5/30/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

libexpat_project : libexpatpython : pythonpython : pythonpython : pythonpython : python

Remediation Guidance

Executive Summary

Cite this page

CVE-2019-15903. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2019-15903

View on NIST NVD

CVE-2019-15903 vulnerability