Path Traversal in Crownpku Rasa Nlu Chi
CVE-2026-117509
A vulnerability was detected in crownpku Rasa_NLU_Chi up to 0.12.2. Affected is the function Persistor._decompress of the file rasa_nlu/persistor.py of the component Model Persistor. The manipulation results in path traversal. The attack may be launched remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Crownpku Rasa Nlu Chi — versions 0.12.0, 0.12.1, 0.12.2
Weakness classification (CWE)
References
- vuldb.com/vuln/427075 (technical-description, vdb-entry)
- vuldb.com/vuln/427075/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-117509 (third-party-advisory)
- vuldb.com/submit/1024527 (third-party-advisory)
- github.com/crownpku/Rasa_NLU_Chi/issues/138 (issue-tracking)
- github.com/user-attachments/files/33302165/poc.zip (exploit)
- github.com/crownpku/Rasa_NLU_Chi/ (product)
Frequently asked questions
- What is CVE-2026-117509?
- CVE-2026-117509 is a medium-severity vulnerability in Crownpku Rasa Nlu Chi, classified under Path Traversal. CVSS score: 6.3/10. Published 2026-10-27.
- How severe is CVE-2026-117509?
- Medium severity. CVSS v3 base score is 6.3 out of 10.