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.

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 c…

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.

Affected products

Hono — versions 0, 4.11.10

Weakness classification (CWE)

CWE-208

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (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.