CVE-2026-56764

Summary

Hono before 4.11.10 contains a timing attack vulnerability in the basicAuth and bearerAuth middlewares due to non-constant-time string comparison in the timingSafeEqual function. Attackers can exploit early termination of string equality checks to infer valid credentials through precise timing measurements.

Affected Software

Weaknesses

• CWE-208: Observable Timing Discrepancy

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/honojs/hono/security/advisories/GHSA-gq3j-xvxp-8hrf
• https://www.vulncheck.com/advisories/hono-timing-attack-in-basicauth-and-bearerauth-middleware

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