Medium severity · published Sep 26, 2026
CVE-2026-100668
Grav before 2.0.25 Sandbox Escape via array Filter
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
Grav 2.0.0 through 2.0.24 contain a Twig content sandbox escape. The `array` filter (and its identical function form) is on the sandbox allowlist but is registered without the needs_is_sandboxed guard that print_r, vardump, json_encode, yaml_encode and string carry, and its implementation calls toArray() — or falls back to an (array) cast — without consulting the sandbox method allowlist. Because the `grav` Twig global is the raw Pimple-based dependency injection container, a user who can author Twig in page content can evaluate `grav|array` to read the container's private $values array, including the un-redacted Config service; a second array cast returns the entire configuration tree, disclosing plugin credentials, SMTP and OAuth secrets, Redis passwords, proxy URLs and the security.* subtree that the sandbox's redaction is meant to hide. Because the payload is stored in page content, the disclosed configuration is rendered to anonymous visitors. Grav 1.7 is not affected as it has no Twig content sandbox. Fixed in Grav 2.0.25.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
grav · getgrav
before 2.0.25 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100668
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100668
vendor-advisory
https://github.com/getgrav/grav/security/advisories/GHSA-59qm-58v5-gvc5
third-party-advisory
https://www.vulncheck.com/advisories/grav-before-2.0.25-sandbox-escape-via-array-filter
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