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.
{
"cwe_ids": [
"CWE-116"
],
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "11.0.0-M1"
},
{
"last_affected": "11.0.20"
},
{
"introduced": "10.1.0-M1"
},
{
"last_affected": "10.1.53"
},
{
"introduced": "9.0.40"
},
{
"last_affected": "9.0.116"
},
{
"introduced": "8.5.84"
},
{
"last_affected": "8.5.100"
}
]
},
{
"source": "DESCRIPTION",
"extracted_events": [
{
"introduced": "11.0.0-M1"
},
{
"fixed": "11.0.20"
},
{
"introduced": "10.1.0-M1"
},
{
"fixed": "10.1.53"
},
{
"introduced": "9.0.40"
},
{
"fixed": "9.0.116"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34483.json",
"cna_assigner": "apache"
}{
"source": "CPE_FIELD",
"extracted_events": [
{
"introduced": "9.0.40"
},
{
"fixed": "9.0.117"
},
{
"introduced": "10.1.0"
},
{
"fixed": "10.1.54"
},
{
"introduced": "11.0.0"
},
{
"fixed": "11.0.21"
}
],
"cpe": "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*"
}