DEBIAN-CVE-2026-40023

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Source
https://security-tracker.debian.org/tracker/CVE-2026-40023
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40023.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40023
Upstream
  • CVE-2026-40023
Published
2026-04-10T16:16:32.600Z
Modified
2026-04-28T20:31:50.097757Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
[none]
Details

Apache Log4cxx's XMLLayout https://logging.apache.org/log4cxx/1.7.0/classlog4cxx11xml11XMLLayout.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.

References

Affected packages

Debian:11 / log4cxx

Package

Name
log4cxx
Purl
pkg:deb/debian/log4cxx?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.11.0-2
0.11.0-2+deb11u1
0.11.0-3
0.12.1-1
0.12.1-2
0.12.1-3
0.12.1-4
0.13.0-1
0.13.0-2
1.*
1.0.0~~gitcbd23ff1-1~exp1
1.0.0~rc1-1
1.0.0-1
1.1.0-1~exp1
1.1.0-1
1.2.0-1
1.3.0-1
1.3.1-1
1.4.0-1
1.4.0-1.1
1.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40023.json"

Debian:12 / log4cxx

Package

Name
log4cxx
Purl
pkg:deb/debian/log4cxx?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.0.0-1
1.0.0-1+deb12u1
1.1.0-1~exp1
1.1.0-1
1.2.0-1
1.3.0-1
1.3.1-1
1.4.0-1
1.4.0-1.1
1.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40023.json"

Debian:13 / log4cxx

Package

Name
log4cxx
Purl
pkg:deb/debian/log4cxx?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.4.0-1
1.4.0-1+deb13u1
1.4.0-1.1
1.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40023.json"

Debian:14 / log4cxx

Package

Name
log4cxx
Purl
pkg:deb/debian/log4cxx?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.4.0-1
1.4.0-1.1
1.5.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40023.json"