{"id":"CVE-2026-6855","aliases":["PYSEC-2026-2521"],"url":"https://o3.security/vulnerability/CVE-2026-6855","summary":"InstructLab vulnerable to Path Traversal","details":"A flaw was found in InstructLab. A local attacker could exploit a path traversal vulnerability in the chat session handler by manipulating the `logs_dir` parameter. This allows the attacker to create new directories and write files to arbitrary locations on the system, potentially leading to unauthorized data modification or disclosure.","published":"2026-04-22T15:31:40Z","modified":"2026-07-13T16:43:43.995990451Z","cvss":{"score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"epss":{"score":0.00164,"percentile":0.0603,"asOf":"2026-08-14"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"instructlab","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6855"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-6855"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2460013"},{"type":"PACKAGE","url":"https://github.com/instructlab/instructlab"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-13T16:43:43.995990451Z"}}