CVE-2026-31857

highpriority · attend · 45EPSS 0.008 · 58 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

4 exploits · PoC

Likely / severe?

0.84% (58th) EPSS

CVSS 8.8 · high

Is it mine?

8 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-26

Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue.

cvss

Technical severity, 0–10. One row per scoring source.

8.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v4.08.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:Usecondary · ENISA EU

v4.08.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · security-advisories@github.com

v4.08.9highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94USCWE-94US

exploits (4)

Public proof-of-concept and weaponised exploit code.

0Asylum/CVE-2026-31857CraftCMS has an RCE vulnerability via relational conditionals in the control panelPoC · poc_in_github
0xTatsuki/CVE-2026-31857Craft CMS RCE via relational conditionals in the control panelPoC · poc_in_github
TRX-0/CVE-2026-31857-craftcms-sstiTRX-0/CVE-2026-31857-craftcms-sstiPoC · poc_in_github
kaizoku73/CVE-2026-31857-PoCProof of Concept for CVE-2026-31857, an authenticated Remote Code Execution vulnerability in Craft CMS caused by unsafe processing of user-controlled Twig expressions.PoC · poc_in_github

affected products (8)

Products and version ranges known to be affected.

craftcms CMS4.0.0-beta.1, → 4.17.4enisa_euvdEU
craftcms CMS5.0.0-RC1, → 5.9.9enisa_euvdEU
craftcms craft cms= 4.0.0nvdUScpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
craftcms craft cms4.0.0.1 → 4.17.4nvdUScpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
craftcms craft cms= 5.0.0nvdUScpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
craftcms craft cms5.0.1 → 5.9.9nvdUScpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
Packagist craftcms/cms4.0.0-beta.1 → 4.17.4osvUSpkg:composer/craftcms/cms
Packagist craftcms/cms5.0.0-RC1 → 5.9.9osvUSpkg:composer/craftcms/cms

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-fp5j-j7j4-mcxcCraftCMS has an RCE vulnerability via relational conditionals in the control panel2026-03-11ghsa · osvUS
A Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The `BaseElementSelectConditionRule::getElementIds()` method passes user-controlled string input through `renderObjectTemplate()` -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.99 release to mitigate the issue.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2026-03-11modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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