CVE-2026-79988

Authenticated RCE through Twig sandbox escape

State: Published
Severity: 8.7 High
Published: Aug 27, 2026
Updated: Aug 28, 2026
Reserved: Aug 25, 2026

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.

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-693 Protection Mechanism Failure

Affected Products

Product	Versions
cmscraftcms	4.0.0-RC1 to before 4.18.3Affected 5.0.0-RC1 to before 5.10.7Affected

References

https://www.hckrt.com/hacktivity/HCKRT-8RQQ7Kthird-party-advisorytechnical-descriptionmitigation
https://github.com/craftcms/cms/releases/tag/5.10.7release-notes
https://github.com/craftcms/cmsproduct

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