Hono added timing comparison hardening in basicAuth and bearerAuth

## Summary The `basicAuth` and `bearerAuth` middlewares previously used a comparison that was not fully timing-safe. The `timingSafeEqual` function used normal string equality (`===`) when comparing hash values. This comparison may stop early if values differ, which can theoretically cause small timing differences. The implementation has been updated to use a safer comparison method. ## Details The issue was caused by the use of normal string equality (`===`) when comparing hash values inside the `timingSafeEqual` function. In JavaScript, string comparison may stop as soon as a difference is found. This means the comparison time can slightly vary depending on how many characters match. Under very specific and controlled conditions, this behavior could theoretically allow timing-based analysis. The implementation has been updated to: - Avoid early termination during comparison - Use a constant-time-style comparison method ## Impact This issue is unlikely to be exploited in normal environments. It may only be relevant in highly controlled situations where precise timing measurements are possible. This change is considered a security hardening improvement. Users are encouraged to upgrade to the latest version.

Source published

19 Feb 2026 20:15:59 UTC

Source modified

10 Sep 2026 03:50:35 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Publisher rating · LOW