CVE-2026-104907

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Source
https://cve.org/CVERecord?id=CVE-2026-104907
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104907.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-104907
Published
2026-10-02T15:51:34Z
Modified
2026-10-04T02:46:04Z
Severity
  • 4.8 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N CVSS Calculator
Summary
MISP: JavaScript Injection via Remote Tag ID in Event Preview Inline Handler
Details

MISP contains a cross-site scripting (XSS) vulnerability in the remote event preview page. When a linked (remote) MISP server is configured, the event preview renders tag identifiers inside an inline JavaScript onclick attribute. The tag ID value was HTML-escaped but not sanitized for the JavaScript string context, meaning a malicious linked server could supply a tag ID containing characters (such as a single quote) that break out of the JavaScript string literal and inject arbitrary script.

Preconditions:

  • A linked/remote MISP server is configured and connected to the local instance.

  • The linked server supplies a crafted tag ID in an event.

  • An authenticated user views the event preview and interacts with the affected tag element.

Impact:

  • Arbitrary JavaScript execution in the context of the viewing user's browser session, potentially allowing session hijacking, data exfiltration, or unauthorized actions on behalf of the user.

Affected versions: MISP prior to the fix commit (v2.5.48 or later, exact boundary unconfirmed).

Database specific 
{
    "cna_assigner": "CIRCL",
    "cwe_ids": [
        "CWE-116",
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104907.json"
}
References

Affected packages

Git / github.com/misp/misp

Affected ranges

Type
GIT
Repo
https://github.com/misp/misp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
70ad174dd
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.5.48"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104907.json"