{"schema":"threatline.record/2","record":{"id":"CVE-2026-104721","aliases":[],"summary":"Logback: Incomplete protection against CVE-2026-19880","details":"Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vulnerability. More specifically, an \nMDC-based discriminator value flows unsanitized into a nested \nFileAppender path, letting an attacker who influences that MDC value \n(e.g. via an HTTP header)\n create and append log files outside the intended directory. \n\n\nThis issue affects Logback-classic: from 0.9.14 through 1.6.4.  This vulnerability is similar to CVE-2026-19880 but involves other attack techniques.","categories":["Unclassified"],"product":"Logback-classic","vendor":"QOS.CH Sarl","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104721","source_modified_at":"2026-10-02T13:21:59.195Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Logback-classic","vendor":"QOS.CH Sarl","versions":[{"status":"affected","version":"0.9.14","lessThanOrEqual":"1.6.4","versionType":"maven"},{"status":"unaffected","version":"1.6.5","versionType":"maven"}],"defaultStatus":"affected"}],"fixed_versions":[],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00332,"percentile":0.25165,"score_date":"2026-10-23"},"published_at":"2026-10-02T13:21:59.195Z","modified_at":"2026-10-02T13:21:59.195Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104721","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T13:21:59.195Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104721","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://logback.qos.ch/news.html#1.6.5"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-02T13:21:59.195Z","content_hash":"eb7bfc68eec1e6387e98196e3db287ddcfe8fdb0449e68469f50d96fc6075e5f"}}