{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-48593",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-05-22T09:36:56.834Z",
        "datePublished": "2026-05-26T19:46:43.980Z",
        "dateUpdated": "2026-05-27T15:40:57.317Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Oban.Web.CronExpr'"
                    ],
                    "packageName": "oban_web",
                    "packageURL": "pkg:hex/oban_web",
                    "product": "oban_web",
                    "programFiles": [
                        "lib/oban/web/cron_expr.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':describe/1"
                        },
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':parse_range/1"
                        },
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':expand_dom_parts/1"
                        },
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':expand_dow_parts/1"
                        }
                    ],
                    "vendor": "oban-bg",
                    "versions": [
                        {
                            "lessThan": "2.12.5",
                            "status": "affected",
                            "version": "2.12.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.Oban.Web.CronExpr'"
                    ],
                    "packageName": "oban-bg/oban_web",
                    "packageURL": "pkg:github/oban-bg/oban_web",
                    "product": "oban_web",
                    "programFiles": [
                        "lib/oban/web/cron_expr.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':describe/1"
                        },
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':parse_range/1"
                        },
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':expand_dom_parts/1"
                        },
                        {
                            "name": "'Elixir.Oban.Web.CronExpr':expand_dow_parts/1"
                        }
                    ],
                    "repo": "https://github.com/oban-bg/oban_web.git",
                    "vendor": "oban-bg",
                    "versions": [
                        {
                            "lessThan": "9998b7e284e02fdd4645dd6231760038e63b584d",
                            "status": "affected",
                            "version": "a97c7960bb389b05aaab4cf8042985f02ceddc24",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>The vulnerability is exploitable when an attacker with access to schedule cron jobs submits a malicious cron expression. The crash is triggered when a user with dashboard access views the cron job list, which calls <tt>'Elixir.Oban.Web.CronExpr':describe/1</tt> to render the expression.</p>"
                        }
                    ],
                    "value": "The vulnerability is exploitable when an attacker with access to schedule cron jobs submits a malicious cron expression. The crash is triggered when a user with dashboard access views the cron job list, which calls 'Elixir.Oban.Web.CronExpr':describe/1 to render the expression."
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "2.12.5",
                                    "versionStartIncluding": "2.12.0",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "OR"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Shannon Selbert"
                },
                {
                    "lang": "en",
                    "type": "analyst",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>Uncontrolled Resource Consumption vulnerability in oban-bg oban_web (<tt>'Elixir.Oban.Web.CronExpr'</tt> modules) allows memory exhaustion via unbounded cron range expansion.</p><p>An attacker with access to schedule cron jobs can submit a malicious cron expression such as <tt>\"0 0 1-100000000 * *\"</tt>. When a user with dashboard access views the cron job list, <tt>'Elixir.Oban.Web.CronExpr':describe/1</tt> is called to render the expression. <tt>parse_range/1</tt> parses both range endpoints via <tt>Integer.parse/1</tt> with no bounds check, and the downstream helpers <tt>expand_dom_parts/1</tt> and <tt>expand_dow_parts/1</tt> materialise the range eagerly via <tt>Enum.to_list/1</tt>, causing allocation of ~2.4 GB and stalling or crashing the BEAM node. A sibling helper <tt>extract_dom_values</tt> already validates range bounds, but the expansion helpers do not.</p><p>This issue affects oban_web: from 2.12.0 before 2.12.5.</p>"
                        }
                    ],
                    "value": "Uncontrolled Resource Consumption vulnerability in oban-bg oban_web ('Elixir.Oban.Web.CronExpr' modules) allows memory exhaustion via unbounded cron range expansion.\n\nAn attacker with access to schedule cron jobs can submit a malicious cron expression such as \"0 0 1-100000000 * *\". When a user with dashboard access views the cron job list, 'Elixir.Oban.Web.CronExpr':describe/1 is called to render the expression. parse_range/1 parses both range endpoints via Integer.parse/1 with no bounds check, and the downstream helpers expand_dom_parts/1 and expand_dow_parts/1 materialise the range eagerly via Enum.to_list/1, causing allocation of ~2.4 GB and stalling or crashing the BEAM node. A sibling helper extract_dom_values already validates range bounds, but the expansion helpers do not.\n\nThis issue affects oban_web: from 2.12.0 before 2.12.5."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-130",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-130 Excessive Allocation"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 5.9,
                        "baseSeverity": "MEDIUM",
                        "privilegesRequired": "LOW",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "PASSIVE",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "HIGH",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-400",
                            "description": "CWE-400 Uncontrolled Resource Consumption",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-05-27T15:40:57.317Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-48593.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48593"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "Unbounded range expansion in cron describe causes memory exhaustion in oban_web",
            "x_generator": {
                "engine": "cvelib 1.8.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-26T20:46:18.908875Z",
                                "id": "CVE-2026-48593",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-26T20:46:24.889Z"
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}