CVE-2026-58655

The bundled Grav Flex Objects plugin (getgrav/grav-plugin-flex-objects) before 1.4.0 contains a stored server-side template injection vulnerability. When rendering dynamic collection or object titles, the plugin passes user-controlled frontmatter values (page.header.flex.collection.title or page.header.flex.object.title) to Twig's template_from_string(), causing them to be evaluated as Twig code rather than treated as text. This path bypasses Grav's Security::cleanDangerousTwig() sanitization. An attacker who can control the title frontmatter of a publicly reachable Flex Objects page can achieve arbitrary Twig execution and escalate to remote command execution via access to internal Grav services such as the scheduler.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8
https://www.vulncheck.com/advisories/grav-flex-objects-server-side-template-injection-via-dynamic-titles
https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8

Configurations

No configuration.

History

15 Jul 2026, 13:17

Type	Values Removed	Values Added
References	~~() https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8 -~~	() https://github.com/getgrav/grav/security/advisories/GHSA-623v-m3c4-3pw8 -

15 Jul 2026, 12:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-15 12:18

Updated : 2026-07-15 21:02

NVD link : CVE-2026-58655

Mitre link : CVE-2026-58655

CVE.ORG link : CVE-2026-58655

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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