Home

Description

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 Reserved 2026-04-22 | Published 2026-04-22 | Updated 2026-04-24 | Assigner redhat




HIGH: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem types

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-04-15:Reported to Red Hat.
2026-04-15:Made public.

Credits

Red Hat would like to thank Martin Brodeur (independent security researcher) for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-6855 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2460013 (RHBZ#2460013) issue-tracking

cve.org (CVE-2026-6855)

nvd.nist.gov (CVE-2026-6855)

Download JSON