What’s Vulnerable › Vulnerabilities

CVE-2026-56764: Hono - Timing Attack in basicAuth and bearerAuth Middleware

• Severity: low (CVSS 3.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-208

Description

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 products

• honojs hono: before 4.11.10 — fixed in 4.11.10

How to fix

Upgrade to a fixed version: honojs hono 4.11.10. Check the vendor advisory for mitigations.

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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