CVE-2026-6855

Severity CVSS v4.0:

Pending analysis

Type:

CWE-22 Path Traversal

Publication date:

22/04/2026

Last modified:

22/04/2026

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

7.10

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://access.redhat.com/security/cve/CVE-2026-6855
https://bugzilla.redhat.com/show_bug.cgi?id=2460013