{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-34483", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-03-30T07:40:44.705Z", "datePublished": "2026-04-09T19:30:28.874Z", "dateUpdated": "2026-04-10T20:17:38.858Z" }, "containers": { "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Apache Tomcat", "vendor": "Apache Software Foundation", "versions": [ { "lessThanOrEqual": "11.0.20", "status": "affected", "version": "11.0.0-M1", "versionType": "semver" }, { "lessThanOrEqual": "10.1.53", "status": "affected", "version": "10.1.0-M1", "versionType": "semver" }, { "lessThanOrEqual": "9.0.116", "status": "affected", "version": "9.0.40", "versionType": "semver" }, { "lessThanOrEqual": "8.5.100", "status": "affected", "version": "8.5.84", "versionType": "semver" }, { "lessThanOrEqual": "8.5.83", "status": "unaffected", "version": "0", "versionType": "semver" } ] } ], "credits": [ { "lang": "en", "type": "finder", "value": "Bartlomiej Dmitruk, striga.ai" } ], "descriptions": [ { "lang": "en", "supportingMedia": [ { "base64": false, "type": "text/html", "value": "
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.
" } ], "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." } ], "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": { "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-04-09T19:30:28.874Z" }, "references": [ { "tags": [ "vendor-advisory" ], "url": "https://lists.apache.org/thread/j1w7304yonlr8vo1tkb5nfs7od1y228b" } ], "source": { "discovery": "EXTERNAL" }, "title": "Apache Tomcat: Incomplete escaping of JSON access logs", "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": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-04-09T23:15:53.097Z" } }, { "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" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-10T20:17:38.858Z" } } ] } }