Craft CMS 5.0.0-RC1 before 5.10.6 Arbitrary File Read via SplFileObject
Craft CMS 5.0.0-RC1 before 5.10.6 and 4.0.0-RC1 before 4.18.2 contain an arbitrary file read vulnerability. The create() Twig function restricts class instantiation using a 5-entry blocklist that does not include SplFileObject, allowing an authenticated administrator (with allowAdminChanges=true) to configure a malicious entry type title or URI format that instantiates SplFileObject in a non-sandboxed template context. When a user subsequently creates an entry in the affected section, arbitrary files on the server (such as .env containing the security key and database credentials) are read and rendered as entry titles.
CVE-2026-72779
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72779
cms
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cms
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "craftcms",
"product": "cms",
"versions": [
{
"status": "affected",
"version": "5.0.0-RC1",
"lessThan": "5.10.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.6",
"versionType": "semver"
}
],
"packageURL": "pkg:composer/craftcms/cms",
"defaultStatus": "unaffected"
},
{
"vendor": "craftcms",
"product": "cms",
"versions": [
{
"status": "affected",
"version": "4.0.0-RC1",
"lessThan": "4.18.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.2",
"versionType": "semver"
}
],
"packageURL": "pkg:composer/craftcms/cms",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-72779
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12826 · Revision 1
- Added to Heist Feed
- Publisher date