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Vulnerability record · CVE-2026-6855 · published 22 April 2026

CVE-2026-6855: Redhat instructlab path traversal vulnerability

Redhat · Instructlab

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.

7.1 CVSS 3.1 High EPSS 0.16% · top 94.4% CWE-22 · Path traversal
7.1CVSS 3.1 base score
0.16%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
26 Oct 2026Last modified by NVD

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.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-6855), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.