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CVE

CVE-2026-29045

Hono: Arbitrary file access via serveStatic vulnerability
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CVE

CVE-2026-29045

Hono: Arbitrary file access via serveStatic vulnerability

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29045.json, https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr, https://nvd.nist.gov/vuln/detail/CVE-2026-29045, https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.0005%
EPSS Percentile
0.1591%
Introduced Version
0
Fix Available
19d20d23a2921e26c3bbfdb5549fce98b4a39b28,0,9.1.10-r7,0.8.3-r1,2.19.5-r3,2.19.5-r1

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