{"id":"CVE-2026-89320","revision":"f12c47499f624c08810e639c0f6cb1ef","records":[{"revision":"f12c47499f624c08810e639c0f6cb1ef","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-89320","aliases":[],"title":"HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K(\"\") for all inputs, voiding CBC-HMAC JWE integrity","description":"`HmacShaCryptor.Hash` never hashed its input. For any input it returned `HMAC_K(\"\")` — the MAC of the empty message under the key. Every AES-CBC-HMAC JWE produced or verified by gose therefore carried an authentication tag that is constant per key and independent of the message, removing ciphertext integrity entirely.","state":0,"publishedAt":"2026-10-23T08:56:20.14+00:00","modifiedAt":"2026-10-23T08:56:20.14+00:00","affected":[{"ecosystem":"Vendor product","name":"github.com/ThalesGroup/gose","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eclipse Foundation\",\n                    \"product\": \"Eclipse KeyPont - GOSE\",\n                    \"packageName\": \"github.com/ThalesGroup/gose\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0.9.0\",\n                            \"lessThanOrEqual\": \"0.13.0-rc1\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"},{"ecosystem":"Vendor product","name":"github.com/eclipse-keypont/gose","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Eclipse Foundation\",\n                    \"product\": \"Eclipse KeyPont - GOSE\",\n                    \"packageName\": \"github.com/eclipse-keypont/gose\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.0.0-rc1\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.8,"severity":"HIGH"}],"references":["https://github.com/eclipse-keypont/gose/security/advisories/GHSA-h6w5-722x-2h3m"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89320","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89320","identifiers":["CVE-2026-89320"]},"retained":false,"historicalAffected":[]}],"coverage":[]}