CVE-2026-117509

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 34.8% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-28.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-10-27 15:30Z2 DAYS AGO

Last updated

2026-10-28 16:16Z1 DAY AGO

Reserved

2026-10-27

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.2

Document digest

48f875274d7520d11385f332cb53bf653f6dbb47f660035c24813777c55547ba

• vuldb.comVDB-427075 | crownpku Rasa_NLU_Chi Model Persistor persistor.py Persistor._decompress path traversalhttps://vuldb.com/vuln/427075vdb-entrytechnical-description
• vuldb.comVDB-427075 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/427075/ctisignaturepermissions-required
• vuldb.comCVE-2026-117509 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-117509third-party-advisory
• vuldb.comSubmit #1024527 | crownpku Rasa_NLU_Chi 0.12.2, commit f995c06e5aee5b6f68ea877c1a271667357a1c68 Path Traversalhttps://vuldb.com/submit/1024527third-party-advisory
• github.comhttps://github.com/crownpku/Rasa_NLU_Chi/issues/138issue-tracking
• github.comhttps://github.com/user-attachments/files/33302165/poc.zipexploit
• github.comhttps://github.com/crownpku/Rasa_NLU_Chi/product