{"schema":"threatline.record/2","record":{"id":"CVE-2026-105244","aliases":[],"summary":"Apache log4net: RemoteSyslogAppender silently deletes non-ASCII content","details":"Improper Encoding or Escaping of Output vulnerability in the RemoteSyslogAppender of Apache log4net.\n\nEvery character outside visible ASCII and space was removed from the record instead of being escaped, so non-ASCII text and control characters such as tabs disappeared without notice. A party whose data reaches a log message could make a distinct value look identical in the record, for example a user name holding a zero-width space logged as admin. Only applications that use RemoteSyslogAppender are affected.\n\nThis issue affects Apache log4net: from 1.2.12 before 3.5.0.\n\nUsers are recommended to upgrade to version 3.5.0, which fixes the issue.","categories":["Unclassified"],"product":"Apache log4net","vendor":"Apache Software Foundation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105244","source_modified_at":"2026-10-07T14:50:49.648Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Apache log4net","vendor":"Apache Software Foundation","versions":[{"status":"affected","version":"1.2.12","lessThan":"3.5.0","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105244","source_modified_at":"2026-10-07T14:50:49.648Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Apache log4net","vendor":"Apache Software Foundation","versions":[{"status":"affected","version":"56a2e146e21ff4737e1ff3ec308810e667873947","lessThan":"77717061b20d4346b6c0ce6b54643d85fb348bc7","versionType":"git"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105244","source_modified_at":"2026-10-07T14:50:49.648Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Apache log4net","ecosystem":null},"version":"3.5.0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105244","source_modified_at":"2026-10-07T14:50:49.648Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"Apache log4net","ecosystem":null},"version":"77717061b20d4346b6c0ce6b54643d85fb348bc7","basis":"first unaffected version stated in the CVE record"}],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00823,"percentile":0.56947,"score_date":"2026-10-23"},"published_at":"2026-10-06T19:52:31.116Z","modified_at":"2026-10-07T14:50:49.648Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105244","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-07T14:50:49.648Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105244","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/apache/logging-log4net/pull/315","tags":["patch"]},{"source":"CVE List","url":"https://github.com/apache/logging-log4net/commit/77717061b20d4346b6c0ce6b54643d85fb348bc7","tags":["patch"]},{"source":"CVE List","url":"https://lists.apache.org/thread.html/q7649hhdodthoqw8jsjgtnb4m8qfy6d6","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-07T14:50:00.691563Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-07T14:50:49.648Z","content_hash":"f4f9a346ca50280cbf64a63fb5c3bf614bdf79826ecac876758f900256a818af"}}