Deserialization of Untrusted Data in Grav CMS - #VU130079
Published: May 5, 2026
Vulnerability identifier: #VU130079
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Grav CMS
Affected software:
Grav CMS
Grav CMS
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in JobQueue reconstruction logic when processing a tampered serialized job payload. A remote attacker can supply a crafted serialized Job object to execute arbitrary code.
Exploitation does not require admin access if any file write primitive is available.
Remediation
Install security update from vendor's website.