CVE-2026-34483

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/9/2026

Last Modified4/14/2026

Sourcenvd

Honeypot Sightings0

Affected Products

apache:tomcat

Weaknesses (CWE)

CWE-116

References

https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b(security@apache.org)

http://www.openwall.com/lists/oss-security/2026/04/09/26(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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