{"id":"CVE-2026-34483","summary":"Apache Tomcat: Incomplete escaping of JSON access logs","details":"Improper Encoding or Escaping of Output vulnerability in the JsonAccessLogValve component of Apache Tomcat.\n\nThis 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.\n\nUsers are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117 , which fix the issue.","aliases":["BIT-tomcat-2026-34483","GHSA-rv64-5gf8-9qq8"],"modified":"2026-05-05T16:31:03.501891Z","published":"2026-04-09T19:30:28.874Z","related":["CGA-xj57-r4vr-7jw9","SUSE-SU-2026:1558-1","SUSE-SU-2026:1572-1","SUSE-SU-2026:1603-1","SUSE-SU-2026:1604-1","SUSE-SU-2026:21366-1","SUSE-SU-2026:21378-1","SUSE-SU-2026:21379-1","openSUSE-SU-2026:10547-1","openSUSE-SU-2026:10548-1","openSUSE-SU-2026:10549-1","openSUSE-SU-2026:20595-1","openSUSE-SU-2026:20611-1","openSUSE-SU-2026:20612-1"],"database_specific":{"cna_assigner":"apache","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"}]}],"cwe_ids":["CWE-116"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34483.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/09/26"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34483.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34483"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/tomcat","events":[{"introduced":"11cce490eb67a8aca64377a22c0cea2e38896725"},{"fixed":"f892e52577feef83aff57d34c2b4be61a5a68524"},{"introduced":"e9d17cddc285615807ec5fef09240777436b25dc"},{"fixed":"8ec9fde54ce6bda64027759389dd755b1b875edc"},{"introduced":"56e547d387ab49f688c93fe9ca082b1b5d94deed"},{"fixed":"1d6b501b493c11ee6fdebae911c67ca214e28c82"}],"database_specific":{"source":"CPE_FIELD","cpe":"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*","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"}]}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-34483.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}