HIGH 8.8 NVD

CVE-2026-89320

`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 produc

`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.

References

https://github.com/eclipse-keypont/gose/security/advisories/GHSA-h6w5-722x-2h3m

Published: 2026-10-23 · Source: NVD · Feed updated: 2026-10-23

This high severity vulnerability with a CVSS score of 8.8 was published on 2026-10-23 via NVD.

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