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Medium

MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph

Type: advisorySources: OSV

MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored value was subsequently concatenated directly into HTML markup by the D3-based correlation graph rendering scripts (both the default and Overmind themes) using the .html() method. A user holding the perm_galaxy_editor permission, which is granted to the stock User role, could store arbitrary HTML or JavaScript in the icon field. Any other user who opened the correlation graph of an event containing a cluster belonging to that galaxy would have the injected script executed in their browser session. Impact: - Arbitrary script execution in the context of the victim's MISP session - Potential theft of session credentials, manipulation of displayed data, or initiation of actions on behalf of the victim - Affects both the default and Overmind UI themes Affected versions: <2.5.48

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-103389
Confirmed fixed CVEs
Not specified
Updated in this feed
4 Nov 2026, 18:23 UTC · Revision 1

Source evidence

MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph

core-osv · Original source

Published 30 Sept 2026, 14:25 UTC

MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored value was subsequently concatenated directly into HTML markup by the D3-based correlation graph rendering scripts (both the default and Overmind themes) using the .html() method. A user holding the perm_galaxy_editor permission, which is granted to the stock User role, could store arbitrary HTML or JavaScript in the icon field. Any other user who opened the correlation graph of an event containing a cluster belonging to that galaxy would have the injected script executed in their browser session. Impact: - Arbitrary script execution in the context of the victim's MISP session - Potential theft of session credentials, manipulation of displayed data, or initiation of actions on behalf of the victim - Affects both the default and Overmind UI themes Affected versions: <2.5.48

osv:CVE-2026-103389
Complete source record
{
  "id": "4d67d2beb5252a8a9a41954711e6a0947a25e4bb62fb4b64a197be385e1931d5",
  "url": "https://osv.dev/vulnerability/CVE-2026-103389",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph",
    "summary": "MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored value was subsequently concatenated directly into HTML markup by the D3-based correlation graph rendering scripts (both the default and Overmind themes) using the .html() method. A user holding the perm_galaxy_editor permission, which is granted to the stock User role, could store arbitrary HTML or JavaScript in the icon field. Any other user who opened the correlation graph of an event containing a cluster belonging to that galaxy would have the injected script executed in their browser session. Impact: - Arbitrary script execution in the context of the victim's MISP session - Potential theft of session credentials, manipulation of displayed data, or initiation of actions on behalf of the victim - Affects both the default and Overmind UI themes Affected versions: <2.5.48",
    "evidence": "osv:CVE-2026-103389",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-103389",
      "aliases": [
        "CVE-2026-103389"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/misp/misp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "63d46c54ccccd646fa352ee74d218f618ccce75b"
                },
                {
                  "fixed": "8ea5783dd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.5.48"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8ea5783dd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.5.47",
            "v2.5.46",
            "v2.5.45",
            "v2.5.44",
            "v2.5.43",
            "v2.5.42",
            "v2.5.41",
            "v2.5.40",
            "v2.5.39",
            "v2.5.37",
            "v2.5.36",
            "v2.5.35",
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            "v2.5.19",
            "v2.5.18",
            "v2.5.17",
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            "v2.5.15",
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            "v2.5.14",
            "v2.5.13",
            "v2.5.11",
            "v2.5.10",
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            "v2.5.0",
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            "v2.4.190",
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            "v2.4.186",
            "v2.4.175",
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            "rm",
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            "v2.4.109",
            "codename/tellurium",
            "v2.4.107",
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            "v2.4.102",
            "v2.4.101",
            "v2.4.100",
            "v2.4.98",
            "v2.4.96",
            "v2.4.95",
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            "v2.4.93",
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            "v2.4.47",
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            "v2.4.25",
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            "v2.4.22",
            "v2.4.21",
            "v2.4.20",
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            "v2.4.2",
            "v2.4.1",
            "v2.4.0",
            "v2.3.0",
            "v0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103389.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.425026086Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103389.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-103389",
        "https://github.com/MISP/MISP/commit/8ea5783dd",
        "https://github.com/MISP/MISP"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20",
          "CWE-79"
        ],
        "cna_assigner": "CIRCL",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103389.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103389",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505633,
  "published_at": "2026-09-30T14:25:59.23+00:00"
}