What is CVE-2026-29045?

CVE-2026-29045 is a high-severity vulnerability in Hono, classified under CWE-177. CVSS score: 7.5/10. Published 2026-03-04.

How severe is CVE-2026-29045?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Hono

CVE-2026-29045

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decodi…

EPSS: 0.004 (35.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Hono
Honojs Hono — versions < 4.12.4

Weakness classification (CWE)

CWE-177

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-29045?: CVE-2026-29045 is a high-severity vulnerability in Hono, classified under CWE-177. CVSS score: 7.5/10. Published 2026-03-04.
How severe is CVE-2026-29045?: High severity. CVSS v3 base score is 7.5 out of 10.