CVE-2026-92917

Grav is a flat-file CMS. In versions 2.0.0-rc.1 through 2.0.21, the Twig content sandbox fails to restrict the dump and serialize filters (print_r, vardump, json_encode, yaml_encode, string): GravExtension::assertSandboxDumpSafe() determines sandbox state by calling SandboxExtension::isSandboxed() without a Source argument, which reports only the global sandbox flag that Grav never enables, so the guard added in GHSA-mc5q-6hpj-rp7j never executes. As a result, an authenticated user with page-edit rights can render {{ config|print_r }} in page content with Twig processing enabled and dump Grav's entire merged configuration — print_r reflects the real Config object held in a private property of the SandboxConfig facade, bypassing its path redaction — exposing plugin secrets such as SMTP credentials, API tokens, webhook secrets and cache backend passwords. Grav 1.7 is not affected because it ships no Twig content sandbox. The issue is fixed in 2.0.22, where the affected filters are registered with Twig's needs_is_sandboxed flag.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/getgrav/grav/security/advisories/GHSA-rfr9-7h4p-gx2x
https://www.vulncheck.com/advisories/grav-2.0.0-rc.1-through-2.0.21-configuration-disclosure-via-print-r
https://github.com/getgrav/grav/security/advisories/GHSA-rfr9-7h4p-gx2x

Configurations

No configuration.

History

19 Sep 2026, 03:17

Type	Values Removed	Values Added
References	~~() https://github.com/getgrav/grav/security/advisories/GHSA-rfr9-7h4p-gx2x -~~	() https://github.com/getgrav/grav/security/advisories/GHSA-rfr9-7h4p-gx2x -

17 Sep 2026, 12:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 12:18

Updated : 2026-09-19 03:17

NVD link : CVE-2026-92917

Mitre link : CVE-2026-92917

CVE.ORG link : CVE-2026-92917

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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