CVE-2026-84363

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Source
https://cve.org/CVERecord?id=CVE-2026-84363
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84363.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-84363
Aliases
Downstream
Published
2026-09-01T20:22:59Z
Modified
2026-09-11T03:30:48Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Hono: Query parser reads parameters after the URL fragment, causing cache-key and proxy interpretation differentials
Details

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.13.5, Hono's query helpers treat a question mark after a literal hash fragment as the start of a query string, so the application can read request parameters that browsers, new URL(), reverse proxies, filtering rules, parameter allow and deny lists, access logging, request validation, and other middleware do not observe. The Cache Middleware removes the fragment when building its cache key, allowing a response influenced by parameters inside the fragment to be stored under a key that omits those parameters and later served to other users. This can bypass filtering and auditing, poison cached responses, and enable stored cross-site scripting when an affected parameter is reflected into cached HTML without escaping. Exploitation requires a runtime and intermediary path that passes a literal hash character through to the request URL; Cloudflare Workers and intermediaries that strip fragments are not affected. This issue is fixed in version 4.13.5.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-444"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84363.json"
}
References

Affected packages

Git / github.com/honojs/hono

Affected ranges

Type
GIT
Repo
https://github.com/honojs/hono
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9c28d724c5a7fb086ebaa812fdc1ad6e957c63bc
Fixed
06880c4a2b04de9dd74217f26dd831209b9c01f1
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.13.5"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.0.1
v0.0.10
v0.0.11
v0.0.13
v0.0.14
v0.0.15
v0.0.16
v0.0.2
v0.0.4
v0.0.5
v0.0.7
v0.0.8
v0.0.9
v0.1.0
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.5.1
v0.5.10
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v1.*
v1.0.0
v1.1.0
v1.1.1
v1.2.0
v1.2.1
v1.2.2
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.5.0
v1.5.1
v1.5.2
v1.6.0
v1.6.0-0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5-0
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.0.6
v2.0.7
v2.0.8
v2.0.9
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.3.0
v2.3.1
v2.3.2
v2.4.0
v2.4.1
v2.5.0
v2.5.1
v2.5.10
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.5.6
v2.5.7
v2.5.8
v2.5.9
v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.7.4
v2.7.5
v2.7.6
v2.7.7
v2.7.8
v3.*
v3.0.0
v3.0.0-rc.10
v3.0.0-rc.13
v3.0.0-rc.14
v3.0.0-rc.15
v3.0.0-rc.16
v3.0.0-rc.4
v3.0.0-rc.5
v3.0.0-rc.9
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.1.0
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.10.0
v3.10.1
v3.10.2
v3.10.3
v3.10.4
v3.10.5
v3.11.0
v3.11.1
v3.11.10
v3.11.11
v3.11.12
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.11.7
v3.11.8
v3.11.9
v3.12.0
v3.12.1
v3.12.10
v3.12.11
v3.12.12
v3.12.2
v3.12.3
v3.12.4
v3.12.5
v3.12.6
v3.12.7
v3.12.8
v3.12.9
v3.2.0
v3.2.0-rc.1
v3.2.0-rc.3
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.2.6
v3.2.7
v3.3.0
v3.3.0-rc.1
v3.3.1
v3.3.2
v3.3.3
v3.3.4
v3.4.0
v3.4.1
v3.4.2
v3.4.3
v3.5.0
v3.5.1
v3.5.2
v3.5.3
v3.5.4
v3.5.5
v3.5.6
v3.5.7
v3.5.8
v3.6.0
v3.6.0-rc.1
v3.6.0-rc.2
v3.6.1
v3.6.2
v3.6.3
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.7.4
v3.7.5
v3.7.6
v3.8.0
v3.8.0-rc.1
v3.8.0-rc.2
v3.8.0-rc.3
v3.8.1
v3.8.2
v3.8.3
v3.8.4
v3.9.0
v3.9.0-rc.1
v3.9.1
v3.9.2
v4.*
v4.0.0
v4.0.0-rc.0
v4.0.0-rc.1
v4.0.0-rc.2
v4.0.0-rc.3
v4.0.1
v4.0.10
v4.0.2
v4.0.3
v4.0.4
v4.0.5
v4.0.6
v4.0.7
v4.0.8
v4.0.9
v4.1.0
v4.1.0-rc.1
v4.1.1
v4.1.2
v4.1.3
v4.1.4
v4.1.5
v4.1.6
v4.1.7
v4.10.0
v4.10.1
v4.10.2
v4.10.3
v4.10.4
v4.10.5
v4.10.6
v4.10.7
v4.10.8
v4.11.0
v4.11.1
v4.11.10
v4.11.2
v4.11.3
v4.11.4
v4.11.5
v4.11.6
v4.11.7
v4.11.8
v4.11.9
v4.12.0
v4.12.1
v4.12.10
v4.12.11
v4.12.12
v4.12.13
v4.12.14
v4.12.15
v4.12.16
v4.12.17
v4.12.18
v4.12.19
v4.12.2
v4.12.20
v4.12.21
v4.12.22
v4.12.23
v4.12.24
v4.12.25
v4.12.26
v4.12.27
v4.12.28
v4.12.29
v4.12.3
v4.12.30
v4.12.31
v4.12.32
v4.12.33
v4.12.34
v4.12.4
v4.12.5
v4.12.6
v4.12.7
v4.12.8
v4.12.9
v4.13.0
v4.13.1
v4.13.2
v4.13.3
v4.13.4
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.2.5
v4.2.6
v4.2.7
v4.2.8
v4.2.9
v4.3.0
v4.3.1
v4.3.10
v4.3.11
v4.3.2
v4.3.3
v4.3.4
v4.3.5
v4.3.6
v4.3.7
v4.3.8
v4.3.9
v4.4.0
v4.4.1
v4.4.10
v4.4.11
v4.4.12
v4.4.13
v4.4.2
v4.4.3
v4.4.4
v4.4.5
v4.4.6
v4.4.7
v4.4.8
v4.4.9
v4.5.0
v4.5.0-rc.1
v4.5.0-rc.2
v4.5.1
v4.5.10
v4.5.11
v4.5.2
v4.5.3
v4.5.4
v4.5.5
v4.5.6
v4.5.7
v4.5.8
v4.5.9
v4.6.0
v4.6.1
v4.6.10
v4.6.11
v4.6.12
v4.6.13
v4.6.14
v4.6.15
v4.6.16
v4.6.17
v4.6.18
v4.6.19
v4.6.2
v4.6.20
v4.6.3
v4.6.4
v4.6.5
v4.6.6
v4.6.7
v4.6.8
v4.6.9
v4.7.0
v4.7.1
v4.7.10
v4.7.11
v4.7.2
v4.7.3
v4.7.4
v4.7.5
v4.7.6
v4.7.7
v4.7.8
v4.7.9
v4.8.0
v4.8.1
v4.8.10
v4.8.11
v4.8.12
v4.8.2
v4.8.3
v4.8.4
v4.8.5
v4.8.6
v4.8.7
v4.8.8
v4.8.9
v4.9.0
v4.9.1
v4.9.10
v4.9.11
v4.9.12
v4.9.2
v4.9.3
v4.9.4
v4.9.5
v4.9.6
v4.9.7
v4.9.8
v4.9.9
vv3.*
vv3.5.0-rc.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84363.json"