LO
Library
Log4j
On CISA KEVExploited in the wildRansomware-linked
20
CVEs
2
On KEV
10.0
Max CVSS
0
New 30D
Severity mix
Critical 6High 8Medium 5Low 1
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| CVE | CVSS | Published | Summary · affected versions |
|---|---|---|---|
| CVE-2021-44228 RansomwareIn wildKEV | 10.0 | Dec 10 | Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints Affected: 2.0.1 before 2.3.1; 2.4.0 before 2.12.2; 2.13.0 before 2.15.0; 2.0; 2.0; 2.0; +1 more |
| CVE-2021-45046 RansomwareIn wildKEV | 9.0 | Dec 14 | Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack Affected: Apache Log4j2 before 2.16.0 |
| CVE-2022-23305 | 9.8 | Jan 18 | 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 Affected: 1.2 through 1.2.17 |
| CVE-2020-9493 | 9.8 | Jun 16 | Java deserialization in Chainsaw Affected: 1.2 before 2.0 |
| CVE-2019-17571 | 9.8 | Dec 20 | 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… Affected: through 1.2.17 |
| CVE-2017-5645 | 9.8 | Apr 17 | 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… Affected: All versions between 2.0-alpha1 and 2.8.1 |
| CVE-2022-23307 | 8.8 | Jan 18 | CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw Affected: 1.2 before 2.0 |
| CVE-2022-23302 | 8.8 | Jan 18 | 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… Affected: 1.0.1 through 1.2.17 |
| CVE-2026-34481 | 7.5 | Apr 10 | Apache Log4j JSON Template Layout: Improper serialization of non-finite floating-point values in JsonTemplateLayout Affected: 2.14.0 before 2.25.4; 3.0.0; 3.0.0; 3.0.0; 3.0.0; 3.0.0; +1 more |
| CVE-2026-34480 | 7.5 | Apr 10 | Apache Log4j Core: Silent log event loss in XmlLayout due to unescaped XML 1.0 forbidden characters Affected: 2.0-alpha1 before 2.25.4; 3.0.0-alpha1 through 3.0.0-beta3 |
| CVE-2026-34479 | 7.5 | Apr 10 | Apache Log4j 1 to Log4j 2 bridge: Silent log event loss in Log4j1XmlLayout due to unescaped XML 1.0 forbidden characters Affected: 2.7 before 2.25.4; 3.0.0; 3.0.0; 3.0.0; 3.0.0; 3.0.0 |
| CVE-2026-34478 | 7.5 | Apr 10 | Apache Log4j Core: Log injection in Rfc5424Layout due to silent configuration incompatibility Affected: 2.21.0 before 2.25.4; 3.0.0-beta1 through 3.0.0-beta3 |
| CVE-2023-26464 | 7.5 | Mar 10 | ** 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… Affected: 1.0.4 before 2.0 |
| CVE-2021-4104 | 7.5 | Dec 14 | JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration Affected: 1.2 |
| CVE-2021-44832 | 6.6 | Dec 28 | Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses… Affected: 2.0.1 before 2.3.2; 2.4 before 2.12.4; 2.13.0 before 2.17.1; 2.0; 2.0; 2.0; +3 more |
| CVE-2026-49844 | 5.9 | Jul 10 | Apache Log4j API: Improper serialization of non-finite floating-point values in MapMessage.asJson() Affected: 2.13.1 before 2.25.5; 2.26.0; 3.0.0; 3.0.0; 3.0.0; 3.0.0; +1 more |
| CVE-2026-34477 | 5.9 | Apr 10 | Apache Log4j Core: verifyHostName attribute silently ignored in TLS configuration, allowing hostname verification bypass Affected: 2.12.0 before 2.25.4; 3.0.0-alpha1 through 3.0.0-beta3 |
| CVE-2021-45105 | 5.9 | Dec 18 | 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 Affected: 2.0 before 2.3.1; 2.4 before 2.12.3; 2.13.0 through 2.16.0 |
| CVE-2025-68161 | 4.8 | Dec 18 | 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… Affected: 2.0.1 before 2.25.3; 2.0; 2.0; 2.0; 2.0; 2.0 |
| CVE-2020-9488 | 3.7 | Apr 27 | Improper validation of certificate with host mismatch in Apache Log4j SMTP appender Affected: 2.0 before 2.3.2; 2.4 before 2.12.3; 2.13.0 before 2.13.2 |
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