Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-109308— Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 RCE via actionCacheUpdates Behavior Injection

Quick assessment

Affected
craftcms cms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Craft CMS 4.0.0 至 4.18.6 以及 5.0.0 至 5.10.13 版本中， 方法将原始的 请求参数直接传递给 ，且未经过 进行清理。这一缺陷可能导致行为（behavior）和事件处理器（event-handler）注入。拥有“执行更新”（performUpdates）权限或可通过 Updates 实用程序访问的已认证控制面板用户，可以通过提供 或 键（例如利用 AttributeTypecastBehavior gadget）来执行任意代码。

CVSS 8.8 · High EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
craftcms cms 4.0.0< 4.18.7 affected
4.18.7 unaffected
5.0.0< 5.10.14 affected
5.10.14 unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-109308

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 RCE via actionCacheUpdates Behavior Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 passes the raw 'updates' request parameter in AppController::actionCacheUpdates to UpdatesModel without Component::cleanseConfig(), allowing behavior and event-handler injection. Authenticated control panel users with the performUpdates permission or Updates-utility access can supply 'as' or 'on' keys, such as an AttributeTypecastBehavior gadget, to execute arbitrary code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms cms 4.0.0 ~ 4.18.7 -
craftcms cms 5.0.0 ~ 5.10.14 -

II. Public POCs for CVE-2026-109308

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-109308

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-109308 (2)

Same Patch Batch · craftcms · 2026-10-12 · 5 CVEs total

CVE-2026-109305 8.8 HIGH Craft CMS 5.10.2 before 5.10.14 Twig Sandbox Bypass RCE via has some/has every
CVE-2026-109306 5.9 MEDIUM Craft CMS 5.0.0 before 5.10.14 Missing Authorization via app/switch-to-licensed-edition
CVE-2026-109304 4.9 MEDIUM Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 Arbitrary File Read via Twig create
CVE-2026-109307 4.7 MEDIUM Craft CMS 5.0.0 before 5.10.14 DOM XSS via returnUrl in 2FA Verification

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-94

V. Comments for CVE-2026-109308

No comments yet

Leave a comment