Vulnerability · Published Apr 22, 2026 · Assigned by redhat
CVE-2026-6855Instructlab: instructlab: path traversal allows arbitrary directory creation and file write
High 7.1
In plain English
A high-severity path traversal in Red Hat Enterprise Linux AI (RHEL AI) 3 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 94.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | instructlab | no fix listed | GHSA-pqmg-c2j8-fq92 |
| PyPI | instructlab | no fix listed | PYSEC-2026-2521 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 | see references |
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 | see references |
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 | see references |
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 | see references |
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 | see references |
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 | see references |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-6855 vdb-entry, x_refsource_REDHAT
- RHBZ#2460013 issue-tracking, x_refsource_REDHAT