CVE-2026-72779

MEDIUM 4.5

Craft CMS 5.0.0-RC1 before 5.10.6 Arbitrary File Read via SplFileObject

CVSS Score

4.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-184
Vendor	craftcms
Product	cms
Published	Aug 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

craftcms / cms

5.0.0-RC1 < 5.10.6

craftcms / cms

4.0.0-RC1 < 4.18.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/craftcms/cms/security/advisories/GHSA-957r-qf9p-67xw vulncheck.com: https://www.vulncheck.com/advisories/craft-cms-rc1-before-arbitrary-file-read-via-splfileobject

Credits

🔍 je-lv