{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23939",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-01-19T14:23:14.343Z",
        "datePublished": "2026-02-26T19:41:18.762Z",
        "dateUpdated": "2026-09-16T15:36:19.353Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Hexpm.Store.Local'"
                    ],
                    "packageName": "hexpm/hexpm",
                    "packageURL": "pkg:github/hexpm/hexpm",
                    "product": "hexpm",
                    "programFiles": [
                        "lib/hexpm/store/local.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Hexpm.Store.Local':get/3"
                        },
                        {
                            "name": "'Elixir.Hexpm.Store.Local':put/4"
                        },
                        {
                            "name": "'Elixir.Hexpm.Store.Local':delete/2"
                        },
                        {
                            "name": "'Elixir.Hexpm.Store.Local':delete_many/2"
                        }
                    ],
                    "repo": "https://github.com/hexpm/hexpm.git",
                    "vendor": "hexpm",
                    "versions": [
                        {
                            "lessThan": "5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0",
                            "status": "affected",
                            "version": "931ee0ed46fa89218e0400a4f6e6d15f96406050",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Only self-hosted hexpm deployments using the <tt>Hexpm.Store.Local</tt> storage backend are affected. The hex.pm service and deployments using S3-compatible object storage backends are not affected."
                        }
                    ],
                    "value": "Only self-hosted hexpm deployments using the Hexpm.Store.Local storage backend are affected. The hex.pm service and deployments using S3-compatible object storage backends are not affected."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:hexpm:hexpm:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0",
                                    "versionStartIncluding": "931ee0ed46fa89218e0400a4f6e6d15f96406050",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "AND"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Michael Lubas / Paraxial.io"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Jonatan Männchen / EEF"
                },
                {
                    "lang": "en",
                    "type": "remediation reviewer",
                    "value": "Eric Meadows-Jönsson / Hex.pm"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Store.Local' module) allows Relative Path Traversal.<p>This vulnerability is associated with program files <tt>lib/hexpm/store/local.ex</tt> and program routines <tt>'Elixir.Hexpm.Store.Local':get/3</tt>, <tt>'Elixir.Hexpm.Store.Local':put/4</tt>, <tt>'Elixir.Hexpm.Store.Local':delete/2</tt>, <tt>'Elixir.Hexpm.Store.Local':delete_many/2</tt>.</p><p>This issue does NOT affect hex.pm the service. Only self-hosted deployments using the Local Storage backend are affected.</p><p>This issue affects hexpm: from 931ee0ed46fa89218e0400a4f6e6d15f96406050 before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0.</p>"
                        }
                    ],
                    "value": "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Store.Local' module) allows Relative Path Traversal. This vulnerability is associated with program files lib/hexpm/store/local.ex and program routines 'Elixir.Hexpm.Store.Local':get/3, 'Elixir.Hexpm.Store.Local':put/4, 'Elixir.Hexpm.Store.Local':delete/2, 'Elixir.Hexpm.Store.Local':delete_many/2.\n\nThis issue does NOT affect hex.pm the service. Only self-hosted deployments using the Local Storage backend are affected.\n\nThis issue affects hexpm: from 931ee0ed46fa89218e0400a4f6e6d15f96406050 before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-139",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-139 Relative Path Traversal"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 6.9,
                        "baseSeverity": "MEDIUM",
                        "exploitMaturity": "NOT_DEFINED",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "vulnIntegrityImpact": "NONE",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-09-16T15:36:19.353Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/hexpm/hexpm/security/advisories/GHSA-42mv-r64p-4869"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-23939.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-23939"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/hexpm/hexpm/commit/5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0"
                }
            ],
            "source": {
                "discovery": "INTERNAL"
            },
            "title": "Path Traversal in Local File Store Backend",
            "workarounds": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<ul><li>Avoid the local file store backend in any exposed environment.</li><li>Restrict network access to the registry when using the local backend.</li><li>Production deployments should use object storage (e.g., S3-compatible backends) instead of the local filesystem store.</li></ul>"
                        }
                    ],
                    "value": "* Avoid the local file store backend in any exposed environment.\n* Restrict network access to the registry when using the local backend.\n* Production deployments should use object storage (e.g., S3-compatible backends) instead of the local filesystem store."
                }
            ],
            "x_generator": {
                "engine": "Vulnogram 0.2.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-02-26T20:24:13.786958Z",
                                "id": "CVE-2026-23939",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-02-26T20:24:24.772Z"
                }
            }
        ]
    }
}