Vulnerability-Lookup

PYSEC-2026-59

Vulnerability from pysec - Published: 2026-04-07 22:16 - Updated: 2026-05-20 09:18

Details

Emmett is a full-stack Python web framework designed with simplicity. From 2.5.0 to before 2.8.1, the RSGI static handler for Emmett's internal assets (/emmett paths) is vulnerable to path traversal attacks. An attacker can use ../ sequences (eg /emmett/../rsgi/handlers.py) to read arbitrary files outside the assets directory. This vulnerability is fixed in 2.8.1.

Severity

7.5 (High)


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

Impacted products

Name	purl
emmett	pkg:pypi/emmett

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "emmett",
        "purl": "pkg:pypi/emmett"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.5.0"
            },
            {
              "fixed": "2.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.0",
        "2.5.1",
        "2.5.10",
        "2.5.11",
        "2.5.12",
        "2.5.13",
        "2.5.2",
        "2.5.3",
        "2.5.4",
        "2.5.5",
        "2.5.6",
        "2.5.7",
        "2.5.8",
        "2.5.9",
        "2.6.0",
        "2.6.1",
        "2.6.2",
        "2.6.3",
        "2.7.0",
        "2.7.1",
        "2.8.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-39847",
    "GHSA-pr46-2v3c-5356"
  ],
  "details": "Emmett is a full-stack Python web framework designed with simplicity. From 2.5.0 to before 2.8.1, the RSGI static handler for Emmett\u0027s internal assets (/__emmett__ paths) is vulnerable to path traversal attacks. An attacker can use ../ sequences (eg /__emmett__/../rsgi/handlers.py) to read arbitrary files outside the assets directory. This vulnerability is fixed in 2.8.1.",
  "id": "PYSEC-2026-59",
  "modified": "2026-05-20T09:18:59.901003Z",
  "published": "2026-04-07T22:16:23.793Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/emmett-framework/emmett/security/advisories/GHSA-pr46-2v3c-5356"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-39847 (GCVE-0-2026-39847)

Vulnerability from cvelistv5 – Published: 2026-04-07 21:37 – Updated: 2026-04-08 15:35

Title

Emmett has a path traversal in internal assets handler

Summary

Emmett is a full-stack Python web framework designed with simplicity. From 2.5.0 to before 2.8.1, the RSGI static handler for Emmett's internal assets (/__emmett__ paths) is vulnerable to path traversal attacks. An attacker can use ../ sequences (eg /__emmett__/../rsgi/handlers.py) to read arbitrary files outside the assets directory. This vulnerability is fixed in 2.8.1.

Severity

9.1 (Critical)


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

CWE

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

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/emmett-framework/emmett/securi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
emmett-framework	emmett	Affected: >= 2.5.0, < 2.8.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-39847",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-08T15:33:34.667959Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-08T15:35:40.853Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "emmett",
          "vendor": "emmett-framework",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.5.0, \u003c 2.8.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Emmett is a full-stack Python web framework designed with simplicity. From 2.5.0 to before 2.8.1, the RSGI static handler for Emmett\u0027s internal assets (/__emmett__ paths) is vulnerable to path traversal attacks. An attacker can use ../ sequences (eg /__emmett__/../rsgi/handlers.py) to read arbitrary files outside the assets directory. This vulnerability is fixed in 2.8.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-07T21:37:54.760Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/emmett-framework/emmett/security/advisories/GHSA-pr46-2v3c-5356",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/emmett-framework/emmett/security/advisories/GHSA-pr46-2v3c-5356"
        }
      ],
      "source": {
        "advisory": "GHSA-pr46-2v3c-5356",
        "discovery": "UNKNOWN"
      },
      "title": "Emmett has a path traversal in internal assets handler"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-39847",
    "datePublished": "2026-04-07T21:37:54.760Z",
    "dateReserved": "2026-04-07T19:13:20.378Z",
    "dateUpdated": "2026-04-08T15:35:40.853Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-PR46-2V3C-5356

Vulnerability from github – Published: 2026-04-08 00:18 – Updated: 2026-04-24 13:51

Summary

Emmett has a path traversal in internal assets handler

Details

The RSGI static handler for Emmett's internal assets (/__emmett__ paths) is vulnerable to path traversal attacks.

An attacker can use ../ sequences (eg /__emmett__/../rsgi/handlers.py) to read arbitrary files outside the assets directory.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "emmett"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.5.0"
            },
            {
              "fixed": "2.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-39847"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-08T00:18:46Z",
    "nvd_published_at": "2026-04-07T22:16:23Z",
    "severity": "HIGH"
  },
  "details": "The RSGI static handler for Emmett\u0027s internal assets (`/__emmett__` paths) is vulnerable to path traversal attacks.\n\nAn attacker can use `../` sequences (eg `/__emmett__/../rsgi/handlers.py`) to read arbitrary files outside the assets directory.",
  "id": "GHSA-pr46-2v3c-5356",
  "modified": "2026-04-24T13:51:30Z",
  "published": "2026-04-08T00:18:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/emmett-framework/emmett/security/advisories/GHSA-pr46-2v3c-5356"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39847"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/emmett-framework/emmett"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Emmett has a path traversal in internal assets handler"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

PYSEC-2026-59

CVE-2026-39847 (GCVE-0-2026-39847)

GHSA-PR46-2V3C-5356

Tags

Sightings

Nomenclature