Vulnerability 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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-89320?
CVE-2026-89320 is a documented vulnerability. `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...
How severe is CVE-2026-89320?
CVSS scoring is not yet available for CVE-2026-89320. Check NVD for updates.
Is there a patch for CVE-2026-89320?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.