High severity · published Aug 24, 2026
CVE-2026-78416
Authenticated RCE via `condition.config` JSON cleanse bypass
8.7
CVSS
1%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
4.0.0-RC1 before 4.18.2; 5.0.0-RC1 before 5.10.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78416
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78416
github.com
https://github.com/craftcms/cms
github.com
https://github.com/craftcms/cms/releases/tag/5.10.6
www.hckrt.com
https://www.hckrt.com/hacktivity/HCKRT-JD662P
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