{"id":"CVE-2026-34483","state":"PUBLISHED","title":"Apache Tomcat: Incomplete escaping of JSON access logs","description":"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.","publishedAt":"2026-04-09T19:30:28.874Z","updatedAt":"2026-04-10T20:17:38.858Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache Tomcat"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","status":"affected","lessThanOrEqual":"11.0.20","versionType":"semver"},{"version":"10.1.0-M1","status":"affected","lessThanOrEqual":"10.1.53","versionType":"semver"},{"version":"9.0.40","status":"affected","lessThanOrEqual":"9.0.116","versionType":"semver"},{"version":"8.5.84","status":"affected","lessThanOrEqual":"8.5.100","versionType":"semver"},{"version":"0","status":"unaffected","lessThanOrEqual":"8.5.83","versionType":"semver"}]}],"references":["https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b","http://www.openwall.com/lists/oss-security/2026/04/09/26"],"weaknesses":["CWE-116"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34483.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34483","state":"PUBLISHED","datePublished":"2026-04-09T19:30:28.874Z","dateUpdated":"2026-04-10T20:17:38.858Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-03-30T07:40:44.705Z"},"containers":{"cna":{"title":"Apache Tomcat: Incomplete escaping of JSON access logs","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","status":"affected","lessThanOrEqual":"11.0.20","versionType":"semver"},{"version":"10.1.0-M1","status":"affected","lessThanOrEqual":"10.1.53","versionType":"semver"},{"version":"9.0.40","status":"affected","lessThanOrEqual":"9.0.116","versionType":"semver"},{"version":"8.5.84","status":"affected","lessThanOrEqual":"8.5.100","versionType":"semver"},{"version":"0","status":"unaffected","lessThanOrEqual":"8.5.83","versionType":"semver"}]}],"references":[{"url":"https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b","tags":["vendor-advisory"]}],"metrics":[{"other":{"content":{"text":"low"},"type":"Textual description of severity"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-116","description":"CWE-116 Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-04-09T19:30:28.874Z"},"credits":[{"lang":"en","type":"finder","value":"Bartlomiej Dmitruk, striga.ai"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/04/09/26"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-04-09T23:15:53.097Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-10T20:16:32.864927Z","id":"CVE-2026-34483","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-10T20:17:38.858Z"}}]}}}