High
CVE-2026-34481
Apache Log4j's JsonTemplateLayout https://logging.apache.org/log4j/2.x/manual/json-template-layout.html , in versions up to and including 2.25.3, produces invalid JSON output when log events contain…
Tag: Apache Log4j
All CVEs associated with "Apache Log4j". Page 1/1 • 29 CVEs.
About “Apache Log4j”
A curated feed of “Apache Log4j”-related CVEs appears below. We currently track 29 CVEs for this tag (all time). In the last 365 days, 6 were published. Average CVSS is 7.5 (all time; 6.8 over 365d), and 76% are rated High/Critical (all time). Top CWEs (last 365 days): CWE-116 - Improper Encoding or Escaping of Output, CWE-297 - Improper Validation of Certificate with Host Mismatch, CWE-117 - Improper Output Neutralization for Logs.
In our taxonomy this topic maps to a LOW impact class. Language runtimes and libraries cascade through dependency graphs. Upgrade runtime and toolchain, pin versions, rebuild images, and enable SAST or DAST and linters. Use the filters below to sort by CVSS, risk and CWE. Each detail page highlights vendor advisories and mitigation tips.
Support & lifecycle: log4j
This table shows recent release cycles and their projected end-of-life. Data source: endoflife.date.
| Cycle | Release | Latest | EOL | LTS |
|---|---|---|---|---|
| 2.12 | 2.12.4 | Expired | ||
| 2.3 | 2.3.2 | Expired | ||
| 2 | 2.26.0 | - | ||
| 1 | 1.2.17 | Expired |
Maintained Soon (≤ 180 days) Expired
Subscribe lifecycle: RSS (expired) · ICS
Subscribe CVEs: RSS for “Apache Log4j” · RSS (High+Critical only)
CVEs tagged with this topic. Filters apply to the whole list (loaded from JSON).
CVSS ≥ 0.0
2026-04-10
High
CVE-2026-34480
Apache Log4j Core's XmlLayout https://logging.apache.org/log4j/2.x/manual/layouts.html#XmlLayout , in versions up to and including 2.25.3, fails to sanitize characters forbidden by the XML 1.0 spec…
High
CVE-2026-34479
The Log4j1XmlLayout from the Apache Log4j 1-to-Log4j 2 bridge fails to escape characters forbidden by the XML 1.0 standard, producing malformed XML output. Conforming XML parsers are required to reje…
High
CVE-2026-34478
Apache Log4j Core's Rfc5424Layout https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout , in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to…
Medium
CVE-2026-34477
The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete: it addressed hostname verification only when enabled via the log4j2.sslVerifyHostName https://log…
2025-12-18
Medium
CVE-2025-68161
The Socket Appender in Apache Log4j Core versions 2.0-beta9 through 2.25.2 does not perform TLS hostname verification of the peer certificate, even when the verifyHostName https://logging.apache.org…
2024-02-05
Critical
CVE-2024-23049
An issue in symphony v.3.6.3 and before allows a remote attacker to execute arbitrary code via the log4j component.
2023-03-10
High
CVE-2023-26464
** UNSUPPORTED WHEN ASSIGNED ** When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7, an attacker that manages to cause a logging entry involving a specially-craf…
2022-08-24
High
CVE-2021-4125
It was found that the original fix for log4j CVE-2021-44228 and CVE-2021-45046 in the OpenShift metering hive containers was incomplete, as not all JndiLookup.class files were removed. This CVE only…
2022-06-17
High
CVE-2022-33915
Versions of the Amazon AWS Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.3.5 are affected by a race condition that could lead to a local privilege escalation. This Hotpatch pac…
2022-06-14
Low
CVE-2022-29615
SAP NetWeaver Developer Studio (NWDS) - version 7.50, is based on Eclipse, which contains the logging framework log4j in version 1.x. The application's confidentiality and integrity could have a low…
2022-04-19
High
CVE-2022-0070
Incomplete fix for CVE-2021-3100. The Apache Log4j hotpatch package starting with log4j-cve-2021-44228-hotpatch-1.1-16 will now explicitly mimic the Linux capabilities and cgroups of the target Java…
High
CVE-2021-3100
The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.
2022-04-13
High
CVE-2022-24818
GeoTools is an open source Java library that provides tools for geospatial data. The GeoTools library has a number of data sources that can perform unchecked JNDI lookups, which in turn can be used t…
2022-02-20
Critical
CVE-2022-23848
In Alluxio before 2.7.3, the logserver does not validate the input stream. NOTE: this is not the same as the CVE-2021-44228 Log4j vulnerability.
2022-01-18
High
CVE-2022-23307
CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw was a component of Apache Log4j 1.2.x where the same issue exists.
Critical
CVE-2022-23305
By design, the JDBCAppender in Log4j 1.2.x accepts an SQL statement as a configuration parameter where the values to be inserted are converters from PatternLayout. The message converter, %m, is likel…
High
CVE-2022-23302
JMSSink in all versions of Log4j 1.x is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration or if the configuration references an LDAP servic…
2022-01-14
Critical
CVE-2021-44530
An injection vulnerability exists in a third-party library used in UniFi Network Version 6.5.53 and earlier (Log4J CVE-2021-44228) allows a malicious actor to control the application.
2021-12-18
Medium
CVE-2021-45105
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thre…
2021-12-14
Critical
CVE-2021-45046
It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC)…
High
CVE-2021-4104
JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration. The attacker can provide TopicBindingName and TopicConnectio…
2021-12-10
Critical
CVE-2021-44228
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker contro…
2020-04-27
Low
CVE-2020-9488
Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log mess…
2019-12-20
Critical
CVE-2019-17571
Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization ga…
2019-10-12
Critical
CVE-2019-17531
A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2.0.0 through 2.9.10. When Default Typing is enabled (either globally or for a specific property) for an externally exposed JSO…
2017-04-17
Critical
CVE-2017-5645
In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that,…
2013-01-22
Low
CVE-2012-5616
Apache CloudStack 4.0.0-incubating and Citrix CloudPlatform (formerly Citrix CloudStack) before 3.0.6 stores sensitive information in the log4j.conf log file, which allows local users to obtain (1) t…
2010-09-20
Low
CVE-2008-7261
The Workplace (aka WP) component in IBM FileNet P8 Application Engine (P8AE) 3.5.1 before 3.5.1-010 records DEBUG messages containing user credentials in the log4j.xml file, which might allow local u…