CVE-2021-4104

CVE-2021-4104 affects JMSAppender in Log4j 1.2 when it is explicitly configured to use JMSAppender. A deserialization of untrusted data can occur if an attacker can write Log4j configuration and supply TopicBindingName and TopicConnectionFactoryBindingName, causing JMSAppender to perform JNDI req...

CVE-2026-34480

Technical details about CVE-2026-34480 are not publicly available in the provided connected documents. The initial description gives an overview but no vendor/product/version specifics or remediation steps here. Monitor for updates from official advisories.

CVE-2023-26464

The CVE-2023-26464 issue affects Apache Log4j 1.x Chainsaw and SocketAppender when running on JRE

CVE-2026-34478

CVE-2026-34478 (Log4j Core) affects Apache Log4j Core 2.21.0 through 2.25.3 and involves CRLF log-injection risks in stream-based syslog output due to undocumented renames of configuration attributes in Rfc5424Layout. Specifically, the newLineEscape attribute was silently renamed, breaking newlin...

CVE-2026-34481

CVE-2026-34481 affects Apache Log4j’s JsonTemplateLayout. Versions up to 2.25.3 produce invalid JSON when log events contain non-finite floating-point values (NaN, Infinity, -Infinity), violating RFC 8259 and potentially causing downstream log processors to reject or fail indexing. Exploitation r...

CVE-2026-34479

The CVE affects the Apache Log4j 1-to-Log4j 2 bridge: Log4j1XmlLayout used in Log4j Core 2 configurations or via the Log4j 1 compatibility layer with org.apache.log4j.xml.XMLLayout. The root cause is failure to properly escape characters forbidden by XML 1.0, producing malformed XML that conformi...