CVE-2026-18430

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Source

https://cve.org/CVERecord?id=CVE-2026-18430

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18430.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-18430

Published

2026-08-19T15:52:49Z

Modified

2026-10-29T02:30:35Z

Severity

7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N CVSS Calculator

Summary

HumHub 1.18.4 - Stored XSS in comment-deletion notifications through unescaped administrator reason

Details

HumHub 1.18.4 contains a stored cross-site scripting vulnerability in the comment-deletion notification flow. A Space administrator can delete another user's comment, choose to notify the original author, and place HTML/JavaScript in the deletion reason.

Database specific

{
    "cna_assigner":  "Fluid Attacks",
    "cwe_ids":  [
        "CWE-79"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18430.json"
}

References

Affected packages

Git / github.com/humhub/humhub

Affected ranges

Type

GIT

Repo

https://github.com/humhub/humhub

Events

Introduced

3320c4140371b62d8694eeaf943e606d902f007a

Last Affected

3320c4140371b62d8694eeaf943e606d902f007a

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.18.4"
                },
                {
                    "last_affected":  "1.18.4"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        }
    ]
}

Affected versions

1.*

1.18.4

v1.*

v1.18.4

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18430.json"