CVE-2026-89320
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductEclipse KeyPont - GOSE
PublishedOct 23, 2026
First seenOct 23, 2026
Weakness typeCWE-354CWE-354
How to fix
Update
- Eclipse Foundation Eclipse KeyPont - GOSE1.0.0-rc1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Eclipse Foundation Eclipse KeyPont - GOSE | 0.9.0 ≤ v ≤ 0.13.0-rc1, v < 1.0.0-rc1 | 1.0.0-rc1 |
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