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

{
  "id": "bac1edbd43609f46d2e18d8422157b7395f5f9518cf1543c2869e33b7213c6e4",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-117509",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "crownpku Rasa_NLU_Chi Model Persistor persistor.py Persistor._decompress path traversal",
    "summary": "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.",
    "evidence": "cve:CVE-2026-117509",
    "products": [
      {
        "name": {
          "value": "Rasa_NLU_Chi",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-117509",
      "aliases": [
        "CVE-2026-117509"
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "version": "4.0",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "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"
          }
        },
        {
          "cvssV3_1": {
            "version": "3.1",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C"
          }
        },
        {
          "cvssV3_0": {
            "version": "3.0",
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C"
          }
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        {
          "cvssV2_0": {
            "version": "2.0",
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            "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:C"
          }
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      ],
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:crownpku:rasa_nlu_chi:*:*:*:*:*:*:*:*"
          ],
          "vendor": "crownpku",
          "modules": [
            "Model Persistor"
          ],
          "product": "Rasa_NLU_Chi",
          "versions": [
            {
              "status": "affected",
              "version": "0.12.0"
            },
            {
              "status": "affected",
              "version": "0.12.1"
            },
            {
              "status": "affected",
              "version": "0.12.2"
            }
          ]
        }
      ],
      "modified": "2026-10-28T16:16:18.865Z",
      "provider": "cve",
      "references": [
        "https://vuldb.com/vuln/427075",
        "https://vuldb.com/vuln/427075/cti",
        "https://vuldb.com/cve/CVE-2026-117509",
        "https://vuldb.com/submit/1024527",
        "https://github.com/crownpku/Rasa_NLU_Chi/issues/138",
        "https://github.com/user-attachments/files/33302165/poc.zip",
        "https://github.com/crownpku/Rasa_NLU_Chi/"
      ],
      "provider_metadata": {
        "adp": [
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            "title": "CISA ADP Vulnrichment",
            "metrics": [
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                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-117509",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-28T15:57:44.451492Z"
                  }
                }
              }
            ],
            "providerMetadata": {
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              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-28T16:16:18.865Z"
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        "cna": {
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          "shortName": "VulDB",
          "dateUpdated": "2026-10-27T15:30:18.930Z"
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    "related_cves": [
      {
        "value": "CVE-2026-117509",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 460229,
  "published_at": "2026-10-27T15:30:18.93+00:00"
}