High severity · published Aug 27, 2026
CVE-2026-79988
Authenticated RCE through Twig sandbox escape
8.7
CVSS
0.5%
EPSS
No
On KEV
Description
The Twig sandbox mechanism in Craft CMS is configured to allow dangerous functionality from the Yii framework, leading to authenticated RCE similar to previously disclosed vulnerabilities.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% 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 4.18.3; 5.0.0-RC1 before 5.10.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-79988
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-79988
github.com
https://github.com/craftcms/cms
github.com
https://github.com/craftcms/cms/releases/tag/5.10.7
www.hckrt.com
https://www.hckrt.com/hacktivity/HCKRT-8RQQ7K
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