CVE-2026-29045 (GCVE-0-2026-29045)

Vulnerability from cvelistv5 – Published: 2026-03-04 22:09 – Updated: 2026-03-05 15:42
VLAI
Title
Hono: Arbitrary file access via serveStatic vulnerability
Summary
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 decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-05 15:39 UTC
CWE
  • CWE-177 - Improper Handling of URL Encoding (Hex Encoding)
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7789 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
honojs hono Affected: < 4.12.4
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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