CVE-2026-28783: critical vulnerability in craftcms cms
Craft has a Twig Function Blocklist Bypass
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.4epss 0.5%
Craft is a content management system (CMS). Prior to 5.9.0-beta.1 and 4.17.0-beta.1, Craft CMS implements a blocklist to prevent potentially dangerous PHP functions from being called via Twig non-Closure arrow functions. In order to be able to successfully execute this attack, you need to either have allowAdminChanges enabled on production, or a compromised admin account, or an account with access to the System Messages utility. Several PHP functions are not included in the blocklist, which could allow malicious actors with the required permissions to execute various types of payloads, including RCEs, arbitrary file reads, SSRFs, and SSTIs. This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
craftcms · cmsRelated CVEs — craftcms cms
In the same product, most dangerous first.
CVE-2025-32432CRITICALCraft CMS Allows Remote Code ExecutionEPSS 99.8%KEVCVE-2024-56145CRITICALRCE when PHP `register_argc_argv` config setting is enabled in craftcms/cmsEPSS 97.5%KEVCVE-2025-23209HIGHPotential RCE with a compromised security key in craft/cmsEPSS 21.6%KEVCVE-2023-41892CRITICALCraft CMS Remote Code Execution vulnerabilityEPSS 94.2%CVE-2026-32267HIGHCraft CMS Vulnerable to Privilege Escalation/Bypass through UsersController->actionImpersonateWithToken()EPSS 9.6%CVE-2023-40035HIGHCraft CMS vulnerable to Remote Code Execution via validatePath bypassEPSS 2.3%