CVE-2026-48593

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Source
https://cve.org/CVERecord?id=CVE-2026-48593
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48593.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-48593
Aliases
Published
2026-05-26T19:46:43.980Z
Modified
2026-06-18T03:57:13.670326859Z
Severity
  • 5.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Unbounded range expansion in cron describe causes memory exhaustion in oban_web
Details

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. parserange/1 parses both range endpoints via Integer.parse/1 with no bounds check, and the downstream helpers expanddomparts/1 and expanddowparts/1 materialise the range eagerly via Enum.tolist/1, causing allocation of ~2.4 GB and stalling or crashing the BEAM node. A sibling helper extractdomvalues already validates range bounds, but the expansion helpers do not.

This issue affects oban_web: from 2.12.0 before 2.12.5.

Database specific 
{
    "cna_assigner": "EEF",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48593.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "a97c7960bb389b05aaab4cf8042985f02ceddc24"
                },
                {
                    "fixed": "9998b7e284e02fdd4645dd6231760038e63b584d"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-400"
    ]
}
References

Affected packages

Git / github.com/oban-bg/oban_web

Affected ranges

Type
GIT
Repo
https://github.com/oban-bg/oban_web
Events
Introduced
f23d19f035a36430f898c35fcd2168784c427a59
Fixed
a01100b9405fa62009bc1674d5b2bd2acc27e07e
Fixed
9998b7e284e02fdd4645dd6231760038e63b584d
Database specific 
{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "2.12.0"
        },
        {
            "fixed": "2.12.5"
        }
    ]
}

Affected versions

v2.*
v2.12.0
v2.12.1
v2.12.2
v2.12.3
v2.12.4

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48593.json"