Vulnerability-Lookup

CVE-2026-48593 (GCVE-0-2026-48593)

Vulnerability from cvelistv5 – Published: 2026-05-26 19:46 – Updated: 2026-05-27 15:40

Title

Unbounded range expansion in cron describe causes memory exhaustion in oban_web

Summary

Uncontrolled Resource Consumption vulnerability in oban-bg oban_web ('Elixir.Oban.Web.CronExpr' modules) allows memory exhaustion via unbounded cron range expansion. An 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. This issue affects oban_web: from 2.12.0 before 2.12.5.

Severity

5.9 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-26 20:46 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

EEF CNA under the mitre root

CNA scorecard A 97/100 over 352 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/oban-bg/oban_web/security/advi…	vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-48593.html	related
https://osv.dev/vulnerability/EEF-CVE-2026-48593	related
https://github.com/oban-bg/oban_web/commit/9998b7…	patch

Impacted products

2 products

Vendor	Product	Version	CPE status
oban-bg	oban_web	Affected: 2.12.0 , < 2.12.5 (semver) cpe:2.3:a:oban_web_project:oban_web::::::::
oban-bg	oban_web	Affected: a97c7960bb389b05aaab4cf8042985f02ceddc24 , < 9998b7e284e02fdd4645dd6231760038e63b584d (git) cpe:2.3:a:oban_web_project:oban_web::::::::

Credits

Peter Ullrich Shannon Selbert Jonatan Männchen / EEF

Show details on NVD website

JSON

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                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-05-26T20:46:18.908875Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-05-26T20:46:21.859Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
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          }
        ],
        "cna": {
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            {
              "collectionURL": "https://repo.hex.pm",
              "cpes": [
                "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
              ],
              "defaultStatus": "unaffected",
              "modules": [
                "\u0027Elixir.Oban.Web.CronExpr\u0027"
              ],
              "packageName": "oban_web",
              "packageURL": "pkg:hex/oban_web",
              "product": "oban_web",
              "programFiles": [
                "lib/oban/web/cron_expr.ex"
              ],
              "programRoutines": [
                {
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                },
                {
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                },
                {
                  "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:expand_dom_parts/1"
                },
                {
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                }
              ],
              "vendor": "oban-bg",
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                  "versionType": "semver"
                }
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            {
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              "cpes": [
                "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
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              "defaultStatus": "unaffected",
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                "\u0027Elixir.Oban.Web.CronExpr\u0027"
              ],
              "packageName": "oban-bg/oban_web",
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              "product": "oban_web",
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              ],
              "programRoutines": [
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                },
                {
                  "name": "\u0027Elixir.Oban.Web.CronExpr\u0027: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": "\u003cp\u003eThe 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 \u003ctt\u003e\u0027Elixir.Oban.Web.CronExpr\u0027:describe/1\u003c/tt\u003e to render the expression.\u003c/p\u003e"
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              ],
              "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 \u0027Elixir.Oban.Web.CronExpr\u0027: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",
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                  "negate": false,
                  "operator": "OR"
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              ],
              "operator": "AND"
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          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Peter Ullrich"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Shannon Selbert"
            },
            {
              "lang": "en",
              "type": "analyst",
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              "supportingMedia": [
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                  "value": "\u003cp\u003eUncontrolled Resource Consumption vulnerability in oban-bg oban_web (\u003ctt\u003e\u0027Elixir.Oban.Web.CronExpr\u0027\u003c/tt\u003e modules) allows memory exhaustion via unbounded cron range expansion.\u003c/p\u003e\u003cp\u003eAn attacker with access to schedule cron jobs can submit a malicious cron expression such as \u003ctt\u003e\"0 0 1-100000000 * *\"\u003c/tt\u003e. When a user with dashboard access views the cron job list, \u003ctt\u003e\u0027Elixir.Oban.Web.CronExpr\u0027:describe/1\u003c/tt\u003e is called to render the expression. \u003ctt\u003eparse_range/1\u003c/tt\u003e parses both range endpoints via \u003ctt\u003eInteger.parse/1\u003c/tt\u003e with no bounds check, and the downstream helpers \u003ctt\u003eexpand_dom_parts/1\u003c/tt\u003e and \u003ctt\u003eexpand_dow_parts/1\u003c/tt\u003e materialise the range eagerly via \u003ctt\u003eEnum.to_list/1\u003c/tt\u003e, causing allocation of ~2.4 GB and stalling or crashing the BEAM node. A sibling helper \u003ctt\u003eextract_dom_values\u003c/tt\u003e already validates range bounds, but the expansion helpers do not.\u003c/p\u003e\u003cp\u003eThis issue affects oban_web: from 2.12.0 before 2.12.5.\u003c/p\u003e"
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              ],
              "value": "Uncontrolled Resource Consumption vulnerability in oban-bg oban_web (\u0027Elixir.Oban.Web.CronExpr\u0027 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, \u0027Elixir.Oban.Web.CronExpr\u0027: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."
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          "metrics": [
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          "problemTypes": [
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              "descriptions": [
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                  "description": "CWE-400 Uncontrolled Resource Consumption",
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          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-27T15:40:57.317Z",
            "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
            "shortName": "EEF"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "related"
              ],
              "url": "https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4"
            },
            {
              "tags": [
                "related"
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              "url": "https://cna.erlef.org/cves/CVE-2026-48593.html"
            },
            {
              "tags": [
                "related"
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              "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48593"
            },
            {
              "tags": [
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              "url": "https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
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          "title": "Unbounded range expansion in cron describe causes memory exhaustion in oban_web",
          "x_generator": {
            "engine": "cvelib 1.8.0"
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      "cveMetadata": {
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        "assignerShortName": "EEF",
        "cveId": "CVE-2026-48593",
        "datePublished": "2026-05-26T19:46:43.980Z",
        "dateReserved": "2026-05-22T09:36:56.834Z",
        "dateUpdated": "2026-05-27T15:40:57.317Z",
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}

FKIE_CVE-2026-48593

Vulnerability from fkie_nvd - Published: 2026-05-26 21:16 - Updated: 2026-07-24 11:10

Severity

5.9 (Medium) - 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

Summary

References

	URL	Tags
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://cna.erlef.org/cves/CVE-2026-48593.html
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4
	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	https://osv.dev/vulnerability/EEF-CVE-2026-48593

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.hex.pm",
          "cpes": [
            "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "\u0027Elixir.Oban.Web.CronExpr\u0027"
          ],
          "packageName": "oban_web",
          "packageURL": "pkg:hex/oban_web",
          "product": "oban_web",
          "programFiles": [
            "lib/oban/web/cron_expr.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:describe/1"
            },
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:parse_range/1"
            },
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:expand_dom_parts/1"
            },
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027: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": [
            "\u0027Elixir.Oban.Web.CronExpr\u0027"
          ],
          "packageName": "oban-bg/oban_web",
          "packageURL": "pkg:github/oban-bg/oban_web",
          "product": "oban_web",
          "programFiles": [
            "lib/oban/web/cron_expr.ex"
          ],
          "programRoutines": [
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:describe/1"
            },
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:parse_range/1"
            },
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027:expand_dom_parts/1"
            },
            {
              "name": "\u0027Elixir.Oban.Web.CronExpr\u0027: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"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Uncontrolled Resource Consumption vulnerability in oban-bg oban_web (\u0027Elixir.Oban.Web.CronExpr\u0027 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, \u0027Elixir.Oban.Web.CronExpr\u0027: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."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de consumo de recursos no controlado en oban-bg oban_web (m\u00f3dulos \u0027Elixir.Oban.Web.CronExpr\u0027) permite el agotamiento de la memoria a trav\u00e9s de la expansi\u00f3n ilimitada del rango cron.\n\nUn atacante con acceso para programar trabajos cron puede enviar una expresi\u00f3n cron maliciosa como \u00270 0 1-100000000 * *\u0027. Cuando un usuario con acceso al panel de control ve la lista de trabajos cron, se llama a \u0027Elixir.Oban.Web.CronExpr\u0027:describe/1 para renderizar la expresi\u00f3n. parse_range/1 analiza ambos puntos finales del rango a trav\u00e9s de Integer.parse/1 sin verificaci\u00f3n de l\u00edmites, y los ayudantes posteriores expand_dom_parts/1 y expand_dow_parts/1 materializan el rango de forma \u00e1vida a trav\u00e9s de Enum.to_list/1, causando una asignaci\u00f3n de ~2.4 GB y el estancamiento o ca\u00edda del nodo BEAM. Un ayudante hermano extract_dom_values ya valida los l\u00edmites del rango, pero los ayudantes de expansi\u00f3n no lo hacen.\n\nEste problema afecta a oban_web: desde 2.12.0 antes de 2.12.5."
    }
  ],
  "id": "CVE-2026-48593",
  "lastModified": "2026-07-24T11:10:00.170",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "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/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48593",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-26T20:46:18.908875Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-26T21:16:41.857",
  "references": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://cna.erlef.org/cves/CVE-2026-48593.html"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4"
    },
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48593"
    }
  ],
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}

GHSA-6XH2-93P9-VQH4

Vulnerability from github – Published: 2026-06-30 18:32 – Updated: 2026-06-30 18:32

Summary

oban_web: Unbounded range expansion in cron describe causes memory exhaustion

Details

Summary

oban_web 2.12.0 introduced a cron expression parser that expands --separated ranges without validating the endpoints. An attacker with access to schedule cron jobs can submit a malicious expression; when any user with dashboard access views the cron job list, Oban.Web.CronExpr.describe/1 is called to render it, triggering allocation of gigabytes of memory and stalling or crashing the BEAM node.

Details

1. Scheduling: The attacker submits a cron job with a malicious expression such as "0 0 1-100000000 * *". No special privilege is required beyond the ability to schedule cron jobs.

2. Parsing: When the cron list is rendered in the dashboard, describe/1 calls parse_range/1 in lib/oban/web/cron_expr.ex, which calls Integer.parse/1 on both endpoints of the range with no bounds check, returning {:range, start_val, end_val} for any integers.

3. Eager expansion: expand_dom_parts/1 and expand_dow_parts/1 materialise the range via Enum.to_list(start_val..end_val). The input above produces ~100 million integers (~2.4 GB). A sibling helper extract_dom_values already validates range bounds, but the expansion helpers do not.

PoC

Schedule a cron job with expression "0 0 1-100000000 * *" (or any expression with an out-of-domain range).
Have any user with Oban.Web dashboard access navigate to the cron job list.
The dashboard calls describe/1 to render the expression, exhausting BEAM memory and crashing the node.

Impact

CVSS 4.0 score 5.9 (Medium). Affects oban_web >= 2.12.0. Requires the ability to schedule a cron job and a dashboard user to view the cron list; no further privileges are needed.

References

Introduction commit: https://github.com/oban-bg/oban_web/commit/a97c7960bb389b05aaab4cf8042985f02ceddc24
Patch commit: https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d

Severity

5.9 (Medium)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Hex",
        "name": "oban_web"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.12.0"
            },
            {
              "fixed": "2.12.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48593"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T18:32:49Z",
    "nvd_published_at": "2026-05-26T21:16:41Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\n`oban_web` 2.12.0 introduced a cron expression parser that expands `-`-separated ranges without validating the endpoints. An attacker with access to schedule cron jobs can submit a malicious expression; when any user with dashboard access views the cron job list, `Oban.Web.CronExpr.describe/1` is called to render it, triggering allocation of gigabytes of memory and stalling or crashing the BEAM node.\n\n### Details\n\n**1. Scheduling:** The attacker submits a cron job with a malicious expression such as `\"0 0 1-100000000 * *\"`. No special privilege is required beyond the ability to schedule cron jobs.\n\n**2. Parsing:** When the cron list is rendered in the dashboard, `describe/1` calls `parse_range/1` in `lib/oban/web/cron_expr.ex`, which calls `Integer.parse/1` on both endpoints of the range with no bounds check, returning `{:range, start_val, end_val}` for any integers.\n\n**3. Eager expansion:** `expand_dom_parts/1` and `expand_dow_parts/1` materialise the range via `Enum.to_list(start_val..end_val)`. The input above produces ~100 million integers (~2.4 GB). A sibling helper `extract_dom_values` already validates range bounds, but the expansion helpers do not.\n\n### PoC\n\n1. Schedule a cron job with expression `\"0 0 1-100000000 * *\"` (or any expression with an out-of-domain range).\n2. Have any user with Oban.Web dashboard access navigate to the cron job list.\n3. The dashboard calls `describe/1` to render the expression, exhausting BEAM memory and crashing the node.\n\n### Impact\n\nCVSS 4.0 score 5.9 (Medium). Affects `oban_web` \u003e= 2.12.0. Requires the ability to schedule a cron job and a dashboard user to view the cron list; no further privileges are needed.\n\n### References\n\n* Introduction commit: https://github.com/oban-bg/oban_web/commit/a97c7960bb389b05aaab4cf8042985f02ceddc24\n* Patch commit: https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d",
  "id": "GHSA-6xh2-93p9-vqh4",
  "modified": "2026-06-30T18:32:49Z",
  "published": "2026-06-30T18:32:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48593"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/oban-bg/oban_web/commit/a97c7960bb389b05aaab4cf8042985f02ceddc24"
    },
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-48593.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/oban-bg/oban_web"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48593"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "oban_web: Unbounded range expansion in cron describe causes memory exhaustion"
}

Sightings

Author	Source	Type	Date	Other

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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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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.
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CVE-2026-48593 (GCVE-0-2026-48593)

FKIE_CVE-2026-48593

GHSA-6XH2-93P9-VQH4

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