Apache LOG4J
31 CVEs tracked. 2 of them are in CISA KEV.
This hub aggregates every CVE we track for Apache LOG4J, a product in the oss libraries space. Use it to gauge the current risk picture and drill into individual advisories.
Apache LOG4J CVEs per month
| Month | CVEs |
|---|---|
| 2024-10 | 0 |
| 2024-11 | 0 |
| 2024-12 | 0 |
| 2025-01 | 0 |
| 2025-02 | 0 |
| 2025-03 | 0 |
| 2025-04 | 0 |
| 2025-05 | 0 |
| 2025-06 | 0 |
| 2025-07 | 0 |
| 2025-08 | 0 |
| 2025-09 | 0 |
| 2025-10 | 0 |
| 2025-11 | 0 |
| 2025-12 | 1 |
| 2026-01 | 0 |
| 2026-02 | 0 |
| 2026-03 | 0 |
| 2026-04 | 5 |
| 2026-05 | 0 |
| 2026-06 | 0 |
| 2026-07 | 1 |
| 2026-08 | 0 |
| 2026-09 | 0 |
Severity
How the 31 CVEs score on CVSS. Severity is not exploitation: KEV is counted above.
- Critical6
- High10
- Medium14
- Low1
Latest CVEs
The 15 most recently published vulnerabilities affecting Apache LOG4J.
- CVE-2026-49844Apache Log4j API: Improper serialization of non-finite floating-point values in MapMessage.asJson()5.9
- CVE-2026-34481Apache Log4j JSON Template Layout: Improper serialization of non-finite floating-point values in JsonTemplateLayout7.5
- CVE-2026-34480Apache Log4j Core: Silent log event loss in XmlLayout due to unescaped XML 1.0 forbidden characters7.5
- CVE-2026-34479Apache Log4j 1 to Log4j 2 bridge: Silent log event loss in Log4j1XmlLayout due to unescaped XML 1.0 forbidden characters7.5
- CVE-2026-34478Apache Log4j Core: Log injection in Rfc5424Layout due to silent configuration incompatibility7.5
- CVE-2026-34477Apache Log4j Core: verifyHostName attribute silently ignored in TLS configuration, allowing hostname verification bypass5.9
- CVE-2025-68161Apache Log4j Core: Missing TLS hostname verification in Socket appender4.8
- CVE-2023-26464Apache Log4j 1.x (EOL) allows DoS in Chainsaw and SocketAppender7.5
- CVE-2022-0070Log4j hot patch package privilege escalation8.8
- CVE-2021-3100Log4j hot patch package privilege escalation8.8
- CVE-2022-23307A deserialization flaw in the Chainsaw component of Log4j 1 can lead to malicious code execution.8.8
- CVE-2022-23305SQL injection in JDBC Appender in Apache Log4j V19.8
- CVE-2022-23302Deserialization of untrusted data in JMSSink in Apache Log4j 1.x8.8
- CVE-2021-44832Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration6.6
- CVE-2021-45105Apache Log4j2 does not always protect from infinite recursion in lookup evaluation5.9
Product grouping is registry-driven, with AI assist and human review. How it works