Fix JWT validation for Clerk tokens with non-string header fields#6
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Clerk recently started adding `cat` (string) and `oiat` (integer) fields to JWT headers. jsonwebtoken v10's Header.extras uses HashMap<String, String> which rejects non-string values, causing all JWT validation to fail with deserialization errors. Fix: use gitarcode/jsonwebtoken fork with HashMap<String, serde_json::Value> for extras (upstream PR Keats/jsonwebtoken#496). Also cherry-picks upstream clerk-rs PR DarrenBaldwin07#282 (jsonwebtoken 10) and PR DarrenBaldwin07#280 (nbf optional).
kageiit
approved these changes
May 12, 2026
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Summary
Fixes JWT validation failures caused by Clerk adding
oiat(integer) andcat(string) fields to JWT headers.Header.extrasis typed asHashMap<String, String>, which rejects non-string values during deserialization. Clerk's newoiatfield is an integer, causingdecode_header()anddecode()to fail before signature validation even begins.497fdb4) that changesextrastoHashMap<String, serde_json::Value>(cherry-pick of upstream Keats/jsonwebtoken#496)nbfoptional)jwt_debugexample for local JWT validation testing