CVE-2026-89320
HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, voiding CBC-HMAC JWE integrity
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
`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.
| CWE | CWE-354 |
| Vendor | eclipse foundation |
| Product | eclipse keypont - gose |
| Published | Oct 23, 2026 |
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Affected Versions
Eclipse Foundation / Eclipse KeyPont - GOSE
0.9.0 ≤ 0.13.0-rc1
Eclipse Foundation / Eclipse KeyPont - GOSE
0 < 1.0.0-rc1
References
Credits
Eclipse Foundation Security Team