CVE-2026-86730

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-86730
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86730.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-86730
Aliases
  • GHSA-qj4v-m29p-fj4m
Published
2026-09-08T15:14:00Z
Modified
2026-09-10T03:48:32Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Craft CMS 5.0.0-RC1 before 5.10.12 Behavior Injection RCE
Details

Craft CMS versions before 5.10.12 fail to properly cleanse string-typed field-layout elements, allowing authenticated control-panel users to inject Yii2 behavior attachments and event handlers. Attackers can post field-layout tab elements as JSON strings to bypass cleanse validation, then trigger arbitrary object instantiation and code execution through Craft::createObject().

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86730.json"
}
References

Affected packages

Git / github.com/craftcms/cms

Affected ranges

Type
GIT
Repo
https://github.com/craftcms/cms
Events
Introduced
04755d93f86d07cc183db47db8a0eee106892e30
Fixed
4edc686e69515ad42f5608580e351c765b664f80
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "5.0.0-RC1"
        },
        {
            "fixed": "5.10.12"
        },
        {
            "introduced": "0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86730.json"