HIGHCVSS v4 8.8Vulnerability
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 produced or verified by gose therefore carried an authentication tag that is constant per key and independent of the message, removing ciphertext integrity entirely.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-10-23T10:22:12.979337+00:00
- Cvss severity
- HIGH
- Cvss score
- 8.8
- Retrieved at
- 2026-10-23T10:26:21+00:00
- Score
- 8.8
- Cvss version
- 4.0
- Last source
- NVD
- Cve id
- CVE-2026-89320
- Cvss vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- First seen by Signal
- 2026-10-23T10:26:21+00:00
- Vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Published at
- 2026-10-23T09:17:08.610
- Last modified
- 2026-10-23T09:17:08.610
Related Entities (1)
HAS_WEAKNESS (1)
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