Remote Code Execution in Craft CMS from Craft
CVE-2026-31857

8.1HIGH

Key Information:

Vendor

Craftcms

Status
Cms
Vendor
CVE Published:
11 March 2026

What is CVE-2026-31857?

Craft CMS has a remote code execution vulnerability due to improper handling of user-controlled input in the conditions system prior to version 5.9.9 and 4.17.4. The affected method, BaseElementSelectConditionRule::getElementIds(), makes use of the unprotected renderObjectTemplate() function, allowing any authenticated Control Panel user—including those with non-admin roles like Author or Editor—to execute arbitrary code by sending a specially crafted condition rule through standard element listing endpoints. This flaw does not require admin privileges or special permissions, making it particularly dangerous as it bypasses existing production hardening settings. For protection, users are urged to update to the patched versions as soon as possible.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

cms >= 5.0.0-RC1, < 5.9.9 < 5.0.0-RC1, 5.9.9

cms >= 4.0.0-beta.1, < 4.17.4 < 4.0.0-beta.1, 4.17.4

References

https://github.com/craftcms/cms/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/craftcms/cms/commit/8d4903647dcfd31b8d...
x_refsource_MISC

CVSS V4

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.