CVE-2026-78416

Authenticated RCE via `condition.config` JSON cleanse bypass

State: Published
Severity: 8.7 High
Published: Aug 24, 2026
Updated: Aug 26, 2026
Reserved: Aug 24, 2026

Description

Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in control panel element-search condition handling. A JSON cleanse bypass in condition.config allows Yii behavior/event configuration keys to be interpreted after decoding, enabling command execution as the PHP/web user.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	Hackrate

Weaknesses

CWE-915 Improperly controlled modification of Dynamically-Determined object attributes

Affected Products

Product	Versions
cmscraftcms	4.0.0-RC1 to before 4.18.2Affected 5.0.0-RC1 to before 5.10.6Affected

References

https://www.hckrt.com/hacktivity/HCKRT-JD662Pthird-party-advisorytechnical-descriptionmitigation
https://github.com/craftcms/cms/releases/tag/5.10.6release-notes
https://github.com/craftcms/cmsproduct

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