CVE-2026-50281: Craft CMS's mass assignment via id in newAttributes during bulk duplicate overwrites existing elements

high Affects craftcms/cms. Feed 2026.10.29.1, updated 2026-10-28; published 2026-07-02; advisory modified 2026-09-10.

Craft CMS's mass assignment via id in newAttributes during bulk duplicate overwrites existing elements

Package: craftcms/cms Composer
Affected versions: >=5.7.0 and <5.9.21
Fixed in: 5.9.21
Severity: high
Exploitation: not on CISA KEV · EPSS 0% (37.0th percentile)
Published: 2026-07-02
Source: osv.dev

References

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