Vulnerability in Apache Software Foundation Tomcat

CVE-2026-34483

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.40 through 9.0.116. Us…

EPSS: 0.001 (20.9th percentile) — read the EPSS interpretation.

Affected products

Apache Software Foundation Tomcat — versions 11.0.0-M1, 10.1.0-M1, 9.0.40

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b (vendor-advisory)