{"id":"CVE-2026-56700","state":"PUBLISHED","title":"Grav - Multiple Remote Code Execution Vulnerabilities via Unsafe Unserialize and Command Injection","description":"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 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.","publishedAt":"2026-06-30T22:08:40.943Z","updatedAt":"2026-10-08T15:23:25.438Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["Grav Grav"],"affected":[{"vendor":"Grav","product":"Grav","packageURL":"pkg:composer/getgrav/grav","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.0.0-beta.2","versionType":"semver"},{"version":"2.0.0-beta.2","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-vj3m-2g9h-vm4p","https://www.vulncheck.com/advisories/grav-multiple-remote-code-execution-vulnerabilities-via-unsafe-unserialize-and-command-injection"],"weaknesses":["CWE-78","CWE-502"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/56xxx/CVE-2026-56700.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56700","state":"PUBLISHED","datePublished":"2026-06-30T22:08:40.943Z","dateUpdated":"2026-10-08T15:23:25.438Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-22T17:09:16.556Z"},"containers":{"cna":{"title":"Grav - Multiple Remote Code Execution Vulnerabilities via Unsafe Unserialize and Command Injection","descriptions":[{"lang":"en","value":"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 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. 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