cvedb.io
CVE-2026-34477
MEDIUM · CVSS 5.9
EPSS exploitation probability: 0%
Published 2026-04-10T16:16:30.843 · Last modified 2026-06-17T10:39:06.643

Summary

The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete: it addressed hostname verification only when enabled via the log4j2.sslVerifyHostName https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName system property, but not when configured through the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName attribute of the <Ssl> element. Although the verifyHostName configuration attribute was introduced in Log4j Core 2.12.0, it was silently ignored in all versions through 2.25.3, leaving TLS connections vulnerable to interception regardless of the configured value. A network-based attacker may be able to perform a man-in-the-middle attack when

Affected products

apache — log4j

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.