CVE-2026-29045: high-severity vulnerability in honojs hono
Hono: Arbitrary file access via serveStatic vulnerability
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.6%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
honojs · honoRelated CVEs — honojs hono
In the same product, most dangerous first.
CVE-2024-32869MEDIUMHono vulnerable to Restricted Directory Traversal in serveStatic with denoEPSS 0.6%CVE-2023-50710MEDIUMHono's named path parameters can be overridden in TrieRouterEPSS 0.6%CVE-2026-69207MEDIUMHono: ReDoS in CORS middleware via Access-Control-Request-HeadersEPSS 0.6%CVE-2025-58362HIGHHono contains a flaw in URL path parsing, potentially leading to path confusionEPSS 0.6%CVE-2026-84364MEDIUMHono: Unbounded dot-notation nesting in `parseBody()` can cause memory exhaustionEPSS 0.5%CVE-2026-24472MEDIUMHono cache middleware ignores "Cache-Control: private" leading to Web Cache DeceptionEPSS 0.5%