`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.
Metrics
Affected Vendors & Products
References
History
Mon, 02 Nov 2026 14:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Mon, 26 Oct 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Eclipse
Eclipse keypont-gose |
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| Vendors & Products |
Eclipse
Eclipse keypont-gose |
Fri, 23 Oct 2026 09:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | HmacShaCryptor.Hash never hashes its input — returns constant HMAC_K("") for all inputs, voiding CBC-HMAC JWE integrity | |
| Weaknesses | CWE-354 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: eclipse
Published: 2026-10-23T08:56:20.140Z
Updated: 2026-11-02T13:29:45.468Z
Reserved: 2026-09-11T13:55:59.296Z
Link: CVE-2026-89320
Updated: 2026-11-02T13:29:22.903Z
Status : Deferred
Published: 2026-10-23T09:17:08.610
Modified: 2026-11-02T14:17:40.823
Link: CVE-2026-89320
No data.