Vulnerability-Lookup

GHSA-5JHH-46X7-49HP

Vulnerability from github – Published: 2026-10-25 12:30 – Updated: 2026-10-25 12:30

Details

Leon before commit 50df142 contains a path traversal vulnerability in getModelFileNameFromURL() that allows attackers to write files outside the models directory via percent-encoded separators. Attackers can trick a user into running '/download model' with a crafted URL containing encoded '../' sequences to write attacker-controlled content to arbitrary paths writable by Leon.

Severity

6.5 (Medium)


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

6.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-116073"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-25T12:16:29Z",
    "severity": "MODERATE"
  },
  "details": "Leon before commit 50df142 contains a path traversal vulnerability in getModelFileNameFromURL() that allows attackers to write files outside the models directory via percent-encoded separators. Attackers can trick a user into running \u0027/download model\u0027 with a crafted URL containing encoded \u0027../\u0027 sequences to write attacker-controlled content to arbitrary paths writable by Leon.",
  "id": "GHSA-5jhh-46x7-49hp",
  "modified": "2026-10-25T12:30:26Z",
  "published": "2026-10-25T12:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116073"
    },
    {
      "type": "WEB",
      "url": "https://github.com/leon-ai/leon/issues/593"
    },
    {
      "type": "WEB",
      "url": "https://github.com/leon-ai/leon/pull/594"
    },
    {
      "type": "WEB",
      "url": "https://github.com/leon-ai/leon/commit/50df142a89a0859e5b7283d87afdab7b01e712a2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/leon-ai/leon"
    },
    {
      "type": "WEB",
      "url": "https://github.com/leon-ai/leon/blob/21baf11714f618a9367f25882e59e856d3308037/server/src/built-in-command/commands/download-command/download-command.ts#L21-L28"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/leon-before-commit-50df142-path-traversal-via-download-model-command"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-116073 (GCVE-0-2026-116073)

Vulnerability from cvelistv5 – Published: 2026-10-25 11:51 – Updated: 2026-10-25 11:51

Title

Leon before commit 50df142 Path Traversal via /download model Command

Summary

Severity

6.9 (Medium)


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

6.5 (Medium)


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

CWE

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

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6966 records in the last 180 days details

References

6 references

URL	Tags
https://github.com/leon-ai/leon/issues/593	issue-tracking
https://github.com/leon-ai/leon	product
https://github.com/leon-ai/leon/blob/21baf11714f6…	technical-description
https://github.com/leon-ai/leon/pull/594	patchissue-tracking
https://github.com/leon-ai/leon/commit/50df142a89…	patch
https://www.vulncheck.com/advisories/leon-before-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
leon-ai	leon	Affected: a3afdef81c8dd085b922f5a4e6b68bb9b9d802e4 , < 50df142a89a0859e5b7283d87afdab7b01e712a2 (git)

Date Public

2026-10-17 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "leon",
          "vendor": "leon-ai",
          "versions": [
            {
              "lessThan": "50df142a89a0859e5b7283d87afdab7b01e712a2",
              "status": "affected",
              "version": "a3afdef81c8dd085b922f5a4e6b68bb9b9d802e4",
              "versionType": "git"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-10-17T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Leon before commit 50df142 contains a path traversal vulnerability in getModelFileNameFromURL() that allows attackers to write files outside the models directory via percent-encoded separators. Attackers can trick a user into running \u0027/download model\u0027 with a crafted URL containing encoded \u0027../\u0027 sequences to write attacker-controlled content to arbitrary paths writable by Leon."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-25T11:51:00.624Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Issue #593",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/leon-ai/leon/issues/593"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/leon-ai/leon"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/leon-ai/leon/blob/21baf11714f618a9367f25882e59e856d3308037/server/src/built-in-command/commands/download-command/download-command.ts#L21-L28"
        },
        {
          "tags": [
            "patch",
            "issue-tracking"
          ],
          "url": "https://github.com/leon-ai/leon/pull/594"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/leon-ai/leon/commit/50df142a89a0859e5b7283d87afdab7b01e712a2"
        },
        {
          "name": "VulnCheck Advisory: Leon before commit 50df142 Path Traversal via /download model Command",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/leon-before-commit-50df142-path-traversal-via-download-model-command"
        }
      ],
      "title": "Leon before commit 50df142 Path Traversal via /download model Command",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-116073",
    "datePublished": "2026-10-25T11:51:00.624Z",
    "dateReserved": "2026-10-25T01:57:13.048Z",
    "dateUpdated": "2026-10-25T11:51:00.624Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted