Vulnerability-Lookup

GHSA-8575-CR6V-7JH4

Vulnerability from github – Published: 2026-10-07 20:35 – Updated: 2026-10-07 20:35

Summary

Ghost: Stored XSS via SVG Uploads Bypassing Sanitization

Details

Impact

SVG media thumbnails, and SVG images uploaded with a non-SVG file extension, were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site's domain, possibly resulting in compromise of other staff users' admin sessions.

Vulnerable versions

This vulnerability is present in Ghost from v4.22.0 up to v6.64.0.

Patches

v6.65.0 contains a fix for this issue.

How to update

For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.

If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.

References

Ghost thanks Ibrahim AlJaafreh of Cystack Red Team, Anand Prajapati, 白墨, and Nhat Anh Vu for disclosing this vulnerability responsibly.

For more information

If you have any questions or comments about this advisory, email us at security@ghost.org.

Severity

7.3 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "ghost"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.22.0"
            },
            {
              "fixed": "6.65.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-105649"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-434",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-07T20:35:22Z",
    "nvd_published_at": "2026-10-05T20:17:13Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nSVG media thumbnails, and SVG images uploaded with a non-SVG file extension, were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site\u0027s domain, possibly resulting in compromise of other staff users\u0027 admin sessions.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v4.22.0 up to v6.64.0.\n\n### Patches\n\nv6.65.0 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find [Docker\u0027s official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### References\n\nGhost thanks [Ibrahim AlJaafreh](https://cystack.ps) of Cystack Red Team, [Anand Prajapati](https://www.linkedin.com/in/anand-prajapati-7a265a369/), [\u767d\u58a8](https://github.com/5255fgh), and [Nhat Anh Vu](https://github.com/nhattanhh) for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).",
  "id": "GHSA-8575-cr6v-7jh4",
  "modified": "2026-10-07T20:35:22Z",
  "published": "2026-10-07T20:35:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105649"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/issues/30919"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/TryGhost/Ghost"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/releases/tag/v6.65.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Ghost: Stored XSS via SVG Uploads Bypassing Sanitization"
}

CVE-2026-105649 (GCVE-0-2026-105649)

Vulnerability from cvelistv5 – Published: 2026-10-05 19:05 – Updated: 2026-10-06 14:51

Title

Ghost: Stored XSS via SVG Uploads Bypassing Sanitization

Summary

Ghost is a Node.js content management system. From 4.22.0 until 6.65.0, SVG media thumbnails and SVG images uploaded with a non-SVG file extension were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site's domain, possibly resulting in compromise of other staff users' admin sessions. This issue is fixed in version 6.65.0.

Severity

7.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-06 14:36 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-434 - Unrestricted Upload of File with Dangerous Type

Assigner

GitHub_M mitre root Scorecard

References

4 references

URL	Tags
https://github.com/TryGhost/Ghost/security/adviso…	x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/issues/30919	x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/80686226…	x_refsource_MISC
https://github.com/TryGhost/Ghost/releases/tag/v6.65.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
TryGhost	Ghost	Affected: >= 4.22.0, < 6.65.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-105649",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-06T14:36:05.690270Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-06T14:51:50.796Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Ghost",
          "vendor": "TryGhost",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.22.0, \u003c 6.65.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Ghost is a Node.js content management system. From 4.22.0 until 6.65.0, SVG media thumbnails and SVG images uploaded with a non-SVG file extension were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site\u0027s domain, possibly resulting in compromise of other staff users\u0027 admin sessions. This issue is fixed in version 6.65.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-434",
              "description": "CWE-434: Unrestricted Upload of File with Dangerous Type",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-05T19:05:37.839Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4"
        },
        {
          "name": "https://github.com/TryGhost/Ghost/issues/30919",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/TryGhost/Ghost/issues/30919"
        },
        {
          "name": "https://github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072"
        },
        {
          "name": "https://github.com/TryGhost/Ghost/releases/tag/v6.65.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/TryGhost/Ghost/releases/tag/v6.65.0"
        }
      ],
      "source": {
        "advisory": "GHSA-8575-cr6v-7jh4",
        "discovery": "UNKNOWN"
      },
      "title": "Ghost: Stored XSS via SVG Uploads Bypassing Sanitization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-105649",
    "datePublished": "2026-10-05T19:05:37.839Z",
    "dateReserved": "2026-10-05T16:40:39.613Z",
    "dateUpdated": "2026-10-06T14:51:50.796Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-8575-CR6V-7JH4

Impact

Vulnerable versions

Patches

How to update

References

For more information

CVE-2026-105649 (GCVE-0-2026-105649)

Tags

Sightings

Nomenclature

Related by attack behaviour