Technology · Maven
org.apache.logging.log4j:log4j-core (Maven) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in org.apache.logging.log4j:log4j-core (Maven): 0 in the last 7 days and 0 in the last 90 days, 2 of them critical and 2 exploited in the wild. The most recent, CVE-2026-34480, was published on 10 April 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 2
- Exploited in the wild
- 2
About org.apache.logging.log4j:log4j-core (Maven)
Core logging framework for Java applications with multiple appender types.
Latest org.apache.logging.log4j:log4j-core (Maven) vulnerabilities
- CVE-2026-34480: Apache Log4j Core invalid XML output in XmlLayouthighCVSS 7.5EPSS 1.2%
- CVE-2026-34478: Apache Log4j Core log injection in Rfc5424LayouthighCVSS 7.5EPSS 1.2%
- CVE-2026-34477: Apache Log4j Core improper certificate validation in network appendersmediumCVSS 5.9EPSS 0.5%
- CVE-2025-68161: Apache Log4j does not verify the TLS hostname in its Socket AppendermediumCVSS 4EPSS 0.8%
- CVE-2023-26464: Apache Log4j 1.x (EOL) allows Denial of Service (DoS)lowCVSS 3.1EPSS 1.9%
- CVE-2021-44832: Apache Log4j2 remote code execution via JDBC Appender JNDI injectionmediumCVSS 6.6EPSS 97.9%
- CVE-2021-45105: Apache Log4j2 uncontrolled recursion in self-referential lookupshighCVSS 8.6EPSS 100.0%
- CVE-2021-45046: Incomplete fix for Apache Log4j vulnerabilitycriticalexploited in the wildCVSS 9EPSS 100.0%
- CVE-2021-44228: Remote code injection in Log4jcriticalexploited in the wildCVSS 3.1EPSS 100.0%
- CVE-2020-9488: Apache Log4j improper certificate validation in SMTP appenderlowCVSS 3.7EPSS 8.1%
- CVE-2017-5645: Deserialization of Untrusted Data in Log4jlowCVSS 3EPSS 89.8%
Most severe org.apache.logging.log4j:log4j-core (Maven) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2021-45046: Incomplete fix for Apache Log4j vulnerabilitycriticalexploited in the wildCVSS 9EPSS 100.0%
- CVE-2021-44228: Remote code injection in Log4jcriticalexploited in the wildCVSS 3.1EPSS 100.0%
- CVE-2021-45105: Apache Log4j2 uncontrolled recursion in self-referential lookupshighCVSS 8.6EPSS 100.0%
- CVE-2026-34480: Apache Log4j Core invalid XML output in XmlLayouthighCVSS 7.5EPSS 1.2%
- CVE-2026-34478: Apache Log4j Core log injection in Rfc5424LayouthighCVSS 7.5EPSS 1.2%
- CVE-2021-44832: Apache Log4j2 remote code execution via JDBC Appender JNDI injectionmediumCVSS 6.6EPSS 97.9%
- CVE-2026-34477: Apache Log4j Core improper certificate validation in network appendersmediumCVSS 5.9EPSS 0.5%
- CVE-2025-68161: Apache Log4j does not verify the TLS hostname in its Socket AppendermediumCVSS 4EPSS 0.8%
- CVE-2020-9488: Apache Log4j improper certificate validation in SMTP appenderlowCVSS 3.7EPSS 8.1%
- CVE-2023-26464: Apache Log4j 1.x (EOL) allows Denial of Service (DoS)lowCVSS 3.1EPSS 1.9%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many org.apache.logging.log4j:log4j-core (Maven) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/org-apache-logging-log4j-log4j-core)<a href="https://junglewise.ai/threats/technologies/org-apache-logging-log4j-log4j-core"><img src="https://junglewise.ai/threats/technologies/org-apache-logging-log4j-log4j-core/badge.svg" alt="org.apache.logging.log4j:log4j-core (Maven) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/org-apache-logging-log4j-log4j-core.json, and this page as text at https://junglewise.ai/threats/technologies/org-apache-logging-log4j-log4j-core.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "org.apache.logging.log4j:log4j-core (Maven) vulnerabilities", https://junglewise.ai/threats/technologies/org-apache-logging-log4j-log4j-core, 9 November 2026.