CVE-2026-40023

216.73.217.22

· Published 10/04/2026 16:16 · Modified 10/04/2026 17:17

Labels: CVE-2026-40023 2026-04-10 CVE-2026-40023 CWE-116 [email protected]

Essential information

Published: 10/04/2026 16:16
Modified: 10/04/2026 17:17
Author: —
Creator: —
CVSS: 6.3 MEDIUM (v3) 6.3 MEDIUM (v4.0)
CISA KEV: No
CWE: —
CVSS vector: —

CVSS metrics

Description

Apache Log4cxx's XMLLayout https://logging.apache.org/log4cxx/1.7.0/classlog4cxx_1_1xml_1_1XMLLayout.html , in versions before 1.7.0, fails to sanitize characters forbidden by the XML 1.0 specification https://www.w3.org/TR/xml/#charsets in log messages, NDC, and MDC property keys and values, producing invalid XML output. Conforming XML parsers must reject such documents with a fatal error, which may cause downstream log processing systems to drop or fail to index affected records. An attacker who can influence logged data can exploit this to suppress individual log records, impairing audit trails and detection of malicious activity. Users are advised to upgrade to Apache Log4cxx 1.7.0, which fixes this issue.

NVD status

Status: Received — CVE has been recently published to the CVE List and has been received by the NVD.
Source: [email protected]
NVD: View on NVD

Affected products (CPE)

Product	CPE
apache / log4cxx	`cpe:2.3:a:apache:log4cxx:<1.7.0:::::::*`