Path Traversal Vulnerability in InstructLab Affects Red Hat
CVE-2026-6855

7.1HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux Ai (rhel Ai) 3
Vendor
CVE Published:
22 April 2026

What is CVE-2026-6855?

A vulnerability exists in InstructLab that can be exploited by local attackers to perform path traversal via the logs_dir parameter in the chat session handler. This exploitation enables the creation of new directories and writing of files to arbitrary locations on the system, resulting in potential unauthorized data modification or disclosure. Proper validation and sanitization of input parameters are recommended to mitigate this risk.

References

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

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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