{"id":"CVE-2026-56700","title":"Grav CMS before 2.0.0-beta.2 contains multiple code-execution vulnerabilities","summary":"Grav CMS before 2.0.0-beta.2 contains multiple code-execution vulnerabilities. Three unsafe unserialize() calls - in Scheduler\\JobQueue, Framework\\Cache\\Adapter\\FileCache, and Session - deserialize untrusted data without restricting allo…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-78","CWE-502"],"vendor":"Grav","product":"Grav","affected":["Grav < 2.0.0-beta.2"],"published":"2026-06-30","updated":"2026-10-08","sourceUpdated":"2026-10-08T16:17:22.387","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56700","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-vj3m-2g9h-vm4p","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/grav-multiple-remote-code-execution-vulnerabilities-via-unsafe-unserialize-and-command-injection","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-07-01T14:39:52.805678Z"},"epss":0.02528,"epssPercentile":0.84416,"ingestedAt":"2026-10-08T16:52:14.694Z","slug":"CVE-2026-56700","body":"## Overview\n\nGrav CMS before 2.0.0-beta.2 contains multiple code-execution vulnerabilities. Three unsafe unserialize() calls - in Scheduler\\JobQueue, Framework\\Cache\\Adapter\\FileCache, and Session - deserialize untrusted data without restricting allowed classes, enabling PHP object injection and, via a gadget chain, arbitrary code execution where an attacker controls the serialized input. Additionally, InstallCommand's git clone operation passes the branch, url, and path parameters into a shell command without escaping, allowing OS command injection via plugin/theme installation (which requires admin access). A Twig security blocklist bypass (server-side template injection) is also present. The issues are fixed in 2.0.0-beta.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.5,"exploitation":0,"ransomware":0},"changes":[]}