CVE-2026-89320
UNKNOWN
NVD
CVSS Score
0
Severity
UNKNOWN
Published
Oct 23, 2026
Vendor
unknown
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.