Vulnerability in Hono
CVE-2026-56764
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Hono — versions 0, 4.11.10
Weakness classification (CWE)
References
- github.com/honojs/hono/security/advisories/GHSA-gq3j-xvxp-8hrf (vendor-advisory)
- www.vulncheck.com/advisories/hono-timing-attack-in-basicauth-and-bearerauth-mid… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56764?
- CVE-2026-56764 is a low-severity vulnerability in Hono, classified under CWE-208. CVSS score: 3.7/10. Published 2026-07-15.
- How severe is CVE-2026-56764?
- Low severity. CVSS v3 base score is 3.7 out of 10.