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    CVE-2026-89315

    `JwtClaims.MarshalJSON` built a Go struct at runtime with `reflect.StructOf`, synthesising a field named `"A" + claimName` for each untyped claim. `reflect.StructOf` **panics** when a field name is not a valid Go identifier, or when it duplicates another field. Both conditions are reachable from ordinary JWT claim names.

    Published:Oct 23, 2026
    Last Modified:Oct 26, 2026
    EPS:Oct 23, 2026
    EPSS Score:0.00253
    CVSS Score:6.9

    Affected Products

    Vendor
    Eclipse
    Product
    Keypont-gose

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-248 Uncaught Exception

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-89318 (CVSS 6.9) — `JweRsaKeyEncryptionDecryptorImpl.Decrypt` passed the JWE's initialization vector to `cipher.AEAD.Open` withou…
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    CVE-2026-89316 (CVSS 6.3) — `LoadPublicKey` resolved an EC key's curve with an unchecked type assertion, `algToOptsMap[alg].(*ECDSAOptions…
    CVE-2026-89314 (CVSS 6.9) — `jwkFields.CheckConsistency` detected duplicate `key_ops` entries with a pairwise nested loop, making validati…
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    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