What is CVE-2026-29045?

CVE-2026-29045 is a high-severity vulnerability in Honojs 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 Honojs 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: 0.001 (15.9th 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

Honojs Hono — versions < 4.12.4

Weakness classification (CWE)

CWE-177

References

https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr (x_refsource_CONFIRM)
https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-29045?: CVE-2026-29045 is a high-severity vulnerability in Honojs 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.