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CVE-2026-89315

6.9 medium Deferred
NVD · CVE.org

`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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. StatusPublished → DeferredNVD modified 2026-10-23 19:30
  2. StatusReceived → PublishedNVD modified 2026-10-23 08:46
  3. First seenCVSS 6.9NVD modified 2026-10-23 09:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1