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HTTP request headers not extracted as span attributes on Bun #19321

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HTTP request headers not extracted as span attributes on Bun#19321
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chargome

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@chargome
chargome
opened on Feb 13, 2026

Inbound HTTP request headers (e.g. User-Agent, custom headers) are not populated as http.request.header.* attributes on server spans. The OTel HTTP instrumentation doesn't extract these when running on Bun.

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  1. chargome
    self-assigned this
    on Feb 13, 2026

  2. linear commented on Feb 13, 2026

    @linear
    linearBot
    on Feb 13, 2026 – with Linear

    JS-1711

  3. chargome
    added a parent issue on Feb 13, 2026

  4. mydea commented on Oct 23, 2026

    @mydea
    mydea
    on Oct 23, 2026
    Member

    This is fixed: Bun.serve spans set http.request.header.* attributes, and node:http servers on Bun get them via bunHttpServerIntegration (#22870). Closing, feel free to reopen if you still see headers missing.

  5. mydea
    closed this as completedon Oct 23, 2026
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