Path Traversal Vulnerability in crownpku Rasa_NLU_Chi Model Persistor
CVE-2026-117509

5.3MEDIUM

Key Information:

Vendor

Crownpku

Status
Rasa Nlu Chi
Vendor
CVE Published:
27 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-117509?

A path traversal vulnerability exists in the Persistor._decompress function of the Model Persistor within the Rasa_NLU_Chi product. This flaw allows an attacker to manipulate file paths, potentially gaining unauthorized access to the filesystem. Exploitation can be executed remotely, posing significant risks to system integrity. The vulnerability has been publicly acknowledged, yet the project maintainers have not provided an official response to the reported issue, increasing the urgency for users to address this security concern.

Affected Version(s)

Rasa_NLU_Chi 0.12.0

Rasa_NLU_Chi 0.12.1

Rasa_NLU_Chi 0.12.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-117509 - Proof of Concept

References

https://vuldb.com/vuln/427075
vdb-entrytechnical-description
https://vuldb.com/vuln/427075/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-117509
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dem000000 (VulDB User)
VulDB CNA Team
.