High severity7.5NVD Advisory· Published Apr 9, 2026· Updated Apr 14, 2026
CVE-2026-34483
CVE-2026-34483
Description
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.
Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.tomcat:tomcat-catalinaMaven | >= 9.0.40, < 9.0.116 | 9.0.116 |
org.apache.tomcat:tomcat-catalinaMaven | >= 10.1.0-M1, < 10.1.54 | 10.1.54 |
org.apache.tomcat:tomcat-catalinaMaven | >= 11.0.0-M1, < 11.0.21 | 11.0.21 |
org.apache.tomcat:tomcatMaven | >= 9.0.40, < 9.0.116 | 9.0.116 |
org.apache.tomcat:tomcatMaven | >= 10.1.0-M1, < 10.1.54 | 10.1.54 |
org.apache.tomcat:tomcatMaven | >= 11.0.0-M1, < 11.0.21 | 11.0.21 |
org.apache.tomcat.embed:tomcat-embed-coreMaven | >= 9.0.40, < 9.0.116 | 9.0.116 |
org.apache.tomcat.embed:tomcat-embed-coreMaven | >= 10.1.0-M1, < 10.1.54 | 10.1.54 |
org.apache.tomcat.embed:tomcat-embed-coreMaven | >= 11.0.0-M1, < 11.0.21 | 11.0.21 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- www.openwall.com/lists/oss-security/2026/04/09/26nvdMailing ListThird Party AdvisoryWEB
- github.com/advisories/GHSA-rv64-5gf8-9qq8ghsaADVISORY
- lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228bnvdMailing ListVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-34483ghsaADVISORY
News mentions
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