CVE-2026-59895

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Source
https://cve.org/CVERecord?id=CVE-2026-59895
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59895.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-59895
Aliases
Downstream
CGA (73)
CLEANSTART (3)
MINI (11)
ROOT (1)
Published
2026-07-08T16:09:51Z
Modified
2026-10-16T03:00:08Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
Hono: Server-Side XSS via JSX Escaping Bypass in cx() Utility
Details

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.0.0 before 4.12.27, cx() in hono/css composes class names from plain strings but marks the result as already escaped without HTML-escaping the input, allowing untrusted className values used in a JSX class attribute during server-side rendering to break out of the attribute and inject arbitrary markup. This issue is fixed in version 4.12.27.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-116",
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59895.json"
}
References

Affected packages

Git / github.com/honojs/hono

Affected ranges

Type
GIT
Repo
https://github.com/honojs/hono
Events
Introduced
ca6f36511094522b84b6575d99bde4728bcea87c
Fixed
97c6fe1f12298c715eb7b2da65b4b6e0d81682bb
Fixed
cd3f6f7194f0e5c9d4b26ae0cf232018d0f388fc
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*",
            "range": [
                {
                    "introduced": "4.0.0"
                },
                {
                    "fixed": "4.12.27"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "cd3f6f7194f0e5c9d4b26ae0cf232018d0f388fc"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v4.12.27",
            "range": [
                {
                    "fixed": "97c6fe1f12298c715eb7b2da65b4b6e0d81682bb"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v4.*
v4.0.0
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
v4.12.3
v4.12.4
v4.12.5
v4.12.6
v4.12.7
v4.12.8
v4.12.9
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

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59895.json"