{"id":"CVE-2026-61500","revision":"e1aee52cc8974b3b8a313c6b2cbf269f","records":[{"revision":"e1aee52cc8974b3b8a313c6b2cbf269f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-61500","aliases":[],"title":"Rejetto HFS < 3.2.1 Session Forgery via Predictable Signing Key","description":"Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic Math.random() generator and discloses outputs of the same generator to unauthenticated clients during login. A remote attacker can collect a small number of login responses, reconstruct the generator's state, recover the signing key, and forge a valid administrator session cookie, leading to full administrative access and remote code execution via the server_code configuration feature.","state":0,"publishedAt":"2026-07-13T17:21:55.747+00:00","modifiedAt":"2026-10-01T15:20:09.18+00:00","affected":[{"ecosystem":"Vendor product","name":"hfs","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"affected\",\n                    \"packageURL\": \"pkg:github/rejetto/hfs\",\n                    \"vendor\": \"rejetto\",\n                    \"product\": \"hfs\",\n                    \"repo\": \"https://github.com/rejetto/hfs\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"3.0.0\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.2.1\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://github.com/rejetto/hfs/releases/tag/v3.2.1","https://www.vulncheck.com/advisories/rejetto-hfs-session-forgery-via-predictable-signing-key"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61500","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-61500","identifiers":["CVE-2026-61500"]},"retained":false,"historicalAffected":[]}],"coverage":[]}