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    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.

    Published:Oct 23, 2026
    Last Modified:Oct 26, 2026
    EPS:Oct 23, 2026
    EPSS Score:0.00174
    CVSS Score:8.8

    Affected Products

    Vendor
    Eclipse
    Product
    Keypont-gose

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-89319 (CVSS 6.3) — `JweDirectDecryptorBlock.Decrypt` read a 64-bit plaintext length from the `_thales_aad` protected-header field…
    CVE-2026-89318 (CVSS 6.9) — `JweRsaKeyEncryptionDecryptorImpl.Decrypt` passed the JWE's initialization vector to `cipher.AEAD.Open` withou…
    CVE-2026-89317 (CVSS 6.3) — gose parsed the JWS `crit` header into `JwsHeader.Crit` and then never read it. RFC 7515 §4.1.11 requires a re…
    CVE-2026-89316 (CVSS 6.3) — `LoadPublicKey` resolved an EC key's curve with an unchecked type assertion, `algToOptsMap[alg].(*ECDSAOptions…
    CVE-2026-89315 (CVSS 6.9) — `JwtClaims.MarshalJSON` built a Go struct at runtime with `reflect.StructOf`, synthesising a field named `"A" …
    CVE-2026-89314 (CVSS 6.9) — `jwkFields.CheckConsistency` detected duplicate `key_ops` entries with a pairwise nested loop, making validati…
    CVE-2026-89313 (CVSS 6.3) — `JwksTrustStore.Get` assigned each parsed key to the function's **named return value** while refreshing the JW…
    CVE-2026-89312 (CVSS 6.9) — `AesGcmCryptor.Open` passed a caller-supplied nonce straight to `cipher.AEAD.Open` without checking its length…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High