BIT-tomcat-2026-34483

vendorUSosv

Apache Tomcat: Incomplete escaping of JSON access logs

view advisory published 2026-09-11Licence: per source

Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0 through 11.0.20, from 10.1.0 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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-34483US	—	0.46% (40th)	—	2026-04-09
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…

references

External citations — patches, advisories, analysis.

http://www.openwall.com/lists/oss-security/2026/04/09/26ADVISORY
https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228bADVISORY
https://nvd.nist.gov/vuln/detail/CVE-2026-34483WEB

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