CVE-2026-29045Hono: Arbitrary file access via serveStatic vulnerability
Updated under an hour ago ()
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It affects honojs hono and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-177
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
honojs hono honojs:hono (from the name) | before 4.12.4 | CNA record |
hono hono hono:hono | before 4.12.4 | NVD |
References
- https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwrx-refsource-confirm, vendor-advisory
- https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3x-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.