Craft CMS before 5.11.2 Privilege Escalation via getOwners() Sandbox Bypass
Affects Craft CMS 5.8.17 through 5.11.1 for authenticated control panel users who can reach the relational-condition object template feature. Fixed in 5.11.2.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 5.11.2
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Craft CMS versions >= 5.8.17 and < 5.11.2 Requires an authenticated control panel user who can reach the relational-condition object template feature
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 17/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Craft CMS, a content management system, is affected by a privilege escalation flaw in which an authenticated control panel user can remotely take over administrator rights. The attacker needs a low-privilege login and can then promote every account to administrator by supplying crafted query criteria that run attacker-chosen PHP functions.
Read the original description
Craft CMS from 5.8.17 before 5.11.2 contains a privilege escalation vulnerability because getOwners() applies caller criteria without cleansing the query configuration. Authenticated control panel users can invoke attacker-selected static PHP callables via crafted criteria to promote every account to administrator.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.7/10CVSS 8.7
- No patch0/5No signal
What would change the score
- Would score about 67 if added to CISA KEV
- Would score about 62 if CISA's SSVC rates exploitation active
- Would score about 24 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Craft CMS versions >= 5.8.17 and < 5.11.2 Requires an authenticated control panel user who can reach the relational-condition object template featureUpgrade to a fixed version: 5.11.2.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- craftcms cms
From 5.8.17 · fixed in 5.11.2
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-123490
Is CVE-2026-123490 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A sandbox bypass in the getOwners() method lets an authenticated control panel user select and invoke attacker-chosen public static PHP callables. The advisory notes this can be used to promote every account in the Craft users table to administrator.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-123490?
cms: from 5.8.17 before 5.11.2.Source: cve.now feed data
Am I affected, and how do I check?
Craft CMS versions 5.8.17 or later but before 5.11.2 are affected. The method is reachable only by an authenticated control panel user who can use the relational-condition object template feature. To check, look at the installed Craft CMS version, for example in composer.lock or the control panel's system information.Source: vulncheck.com, github.com
How do I fix CVE-2026-123490?
Upgrade Craft CMS to 5.11.2 or later. The advisory lists no workaround.Source: vulncheck.com, github.com