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-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 |
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