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Vulnerability record · CVE-2026-78416 · published 24 August 2026

CVE-2026-78416: Mass assignment vulnerability

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.

8.7 CVSS 4.0 High EPSS 1.0% · top 38.1% CWE-915 · Mass assignment Deferred
8.7CVSS 4.0 base score
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
28 Aug 2026Last modified by NVD

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.

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/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:

References

LinkTags
https://github.com/craftcms/cms
https://github.com/craftcms/cms/releases/tag/5.10.6
https://www.hckrt.com/hacktivity/HCKRT-JD662P

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Source: NIST National Vulnerability Database (record CVE-2026-78416), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.