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CVE-2026-78416— Authenticated RCE via `condition.config` JSON cleanse bypass

Quick assessment

Affected
craftcms cms
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Craft CMS是Craft CMS公司的一套内容管理系统(CMS)。 Craft CMS 4.0.0-RC1至4.18.2之前版本和5.0.0-RC1至5.10.6之前版本存在输入验证错误漏洞，该漏洞源于控制面板元素搜索条件处理中的JSON清理绕过，允许解码后解释Yii行为/事件配置键，经过身份验证的攻击者可利用该漏洞以PHP/Web用户身份执行命令。

CVSS 8.7 · High EPSS 1.02% · P62

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms 4.0.0-RC1< 4.18.2 affected
5.0.0-RC1< 5.10.6 affected
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I. Basic Information for CVE-2026-78416

Vulnerability Information
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Vulnerability Title
Authenticated RCE via `condition.config` JSON cleanse bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-915
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Craft CMS是Craft CMS公司的一套内容管理系统(CMS)。 Craft CMS 4.0.0-RC1至4.18.2之前版本和5.0.0-RC1至5.10.6之前版本存在输入验证错误漏洞，该漏洞源于控制面板元素搜索条件处理中的JSON清理绕过，允许解码后解释Yii行为/事件配置键，经过身份验证的攻击者可利用该漏洞以PHP/Web用户身份执行命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms cms 4.0.0-RC1 ~ 4.18.2 -

II. Public POCs for CVE-2026-78416

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10329 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-78416

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Patches & Fixes for CVE-2026-78416 (1)

News Coverage for CVE-2026-78416 (1)

Vendor Pages for CVE-2026-78416 (1)

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-915

V. Comments for CVE-2026-78416

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