CVE-2026-117509— crownpku Rasa_NLU_Chi Model Persistor persistor.py Persistor._decompress path traversal

Quick assessment

Affected

crownpku Rasa_NLU_Chi

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 crownpku Rasa_NLU_Chi（版本 0.12.2 及以下）中发现一个安全漏洞。受影响的是组件"Model Persistor"中文件内的函数。该函数存在路径遍历漏洞，攻击者可远程发起利用。目前该漏洞的利用方式已公开，可被实际利用。项目方此前已通过问题报告获知此漏洞，但尚未作出回应。

CVSS 6.3 · Medium Updated Oct 27, 2026

Possible ATT&CK Techniques 2 AI

T1059.007 · JavaScript T1203 · Exploitation for Client Execution

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Vulnerability Information

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Vulnerability Title

crownpku Rasa_NLU_Chi Model Persistor persistor.py Persistor._decompress path traversal

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
crownpku	Rasa_NLU_Chi	0.12.0	`cpe:2.3:a:crownpku:rasa_nlu_chi::::::::`

II. Public POCs for CVE-2026-117509

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-117509

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Other References for CVE-2026-117509 (7)

https://github.com/user-attachments/files/33302165/poc.zip exploit
https://github.com/crownpku/Rasa_NLU_Chi/issues/138 issue-tracking
https://github.com/crownpku/Rasa_NLU_Chi/ product
https://vuldb.com/cve/CVE-2026-117509 third-party-advisory
https://vuldb.com/vuln/427075/cti signature permissions-required
https://vuldb.com/vuln/427075 vdb-entry technical-description
https://vuldb.com/submit/1024527 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-117509

IV. Related Vulnerabilities

Same weakness: CWE-22