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CVE-2026-78416

Authenticated RCE via `condition.config` JSON cleanse bypass

HIGH
8.7
CVSS Score
Published: August 24, 2026 at 03:36 PM UTC
Updated: October 12, 2026 at 03:10 PM UTC
1 product affected across 1 vendorCraftcms

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Severity
HIGH8.7
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Craftcms· Craftcmscomposer
90%
4.0.0-RC1 ≤ v < 4.18.25.0.0-RC1 ≤ v < 5.10.64.0.0-RC15.0.0-RC1
Affected range stops below 4.18.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.10.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Third Party AdvisoryTechnical DescriptionMitigation
Source: cverecord
https://www.hckrt.com/hacktivity/HCKRT-JD662P
Release Notes
Source: cverecord
https://github.com/craftcms/cms/releases/tag/5.10.6
Product
Source: cverecord
https://github.com/craftcms/cms

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHHackrate
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-915

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