Vulnerability-Lookup

CVE-2026-59817 (GCVE-0-2026-59817)

Vulnerability from cvelistv5 – Published: 2026-07-09 17:40 – Updated: 2026-07-14 01:04

Title

Ghost: Paid gift memberships obtainable at minimal cost via the donations feature

Summary

Ghost is a Node.js content management system. From 6.27.0 before 6.44.0, Ghost's public donation checkout flow allowed an unauthenticated attacker to control donation checkout metadata and obtain full paid gift memberships for a minimal payment without exposing customer or member data or stealing money from a site or its members. This issue is fixed in version 6.44.0.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-14 01:04 UTC

CWE

CWE-472 - External Control of Assumed-Immutable Web Parameter
CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/TryGhost/Ghost/security/adviso…	x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/pull/28351	x_refsource_MISC
https://github.com/TryGhost/Ghost/pull/28352	x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/cab716cd…	x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/ee7b991b…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
TryGhost	Ghost	Affected: >= 6.27.0, < 6.44.0	guessed

Show details on NVD website

JSON

To clipboard

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}

bit-ghost-2026-59817

Vulnerability from bitnami_vulndb

Published

2026-07-15 08:45

Modified

2026-07-15 09:15

Summary

Ghost: Paid gift memberships obtainable at minimal cost via the donations feature

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "ghost",
        "purl": "pkg:bitnami/ghost"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.27.0"
            },
            {
              "fixed": "6.44.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59817"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:ghost:ghost:*:*:*:*:*:node.js:*:*"
    ],
    "severity": "Medium"
  },
  "details": "Ghost is a Node.js content management system. From 6.27.0 before 6.44.0, Ghost\u0027s public donation checkout flow allowed an unauthenticated attacker to control donation checkout metadata and obtain full paid gift memberships for a minimal payment without exposing customer or member data or stealing money from a site or its members. This issue is fixed in version 6.44.0.",
  "id": "BIT-ghost-2026-59817",
  "modified": "2026-07-15T09:15:52.837Z",
  "published": "2026-07-15T08:45:24.752Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/commit/cab716cd015ac04b7ee50c7a405478d97bc7b1e0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/commit/ee7b991b466a7849c70f9d1caed8e491ee4113c6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/pull/28351"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/pull/28352"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-xm43-3m56-w3wf"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59817"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Ghost: Paid gift memberships obtainable at minimal cost via the donations feature"
}

FKIE_CVE-2026-59817

Vulnerability from fkie_nvd - Published: 2026-07-09 18:16 - Updated: 2026-07-14 02:16

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/TryGhost/Ghost/commit/cab716cd015ac04b7ee50c7a405478d97bc7b1e0
	security-advisories@github.com	https://github.com/TryGhost/Ghost/commit/ee7b991b466a7849c70f9d1caed8e491ee4113c6
	security-advisories@github.com	https://github.com/TryGhost/Ghost/pull/28351
	security-advisories@github.com	https://github.com/TryGhost/Ghost/pull/28352
	security-advisories@github.com	https://github.com/TryGhost/Ghost/security/advisories/GHSA-xm43-3m56-w3wf

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Ghost",
          "vendor": "TryGhost",
          "versions": [
            {
              "status": "affected",
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            }
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    }
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    }
  ],
  "id": "CVE-2026-59817",
  "lastModified": "2026-07-14T02:16:57.390",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
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          "confidentialityImpact": "NONE",
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}

GHSA-XM43-3M56-W3WF

Vulnerability from github – Published: 2026-08-04 21:57 – Updated: 2026-08-04 21:57

Summary

Ghost: Paid gift memberships obtainable at minimal cost via the donations feature

Details

Impact

A vulnerability in Ghost's public donation checkout flow allowed an unauthenticated attacker to obtain full paid gift memberships for a minimal payment. No customer or member data was exposed, and the issue could not be used to steal money from a site or its members.

Vulnerable versions

This vulnerability is present in Ghost from v6.27.0 up to v6.43.1.

Patches

v6.44.0 contains a fix for this issue.

How to update

For self-hosters using Docker, find Docker’s official Ghost image on Docker Hub and follow the documentation on updating a Docker-based Ghost instance.

For self-hosters using Ghost-CLI, see the documentation for updating Ghost to the latest version.

Workarounds

If upgrading immediately is not possible, you can remove the vulnerable checkout path by disabling the donations feature in Ghost Admin under Settings → Membership → Tips & donations until the upgrade is applied.

References

Ghost thanks sane100400 and p4p3r for disclosing this vulnerability responsibly.

For more information

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

Severity

5.3 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "ghost"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.27.0"
            },
            {
              "fixed": "6.44.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59817"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-472",
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-04T21:57:48Z",
    "nvd_published_at": "2026-07-09T18:16:57Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nA vulnerability in Ghost\u0027s public donation checkout flow allowed an unauthenticated attacker to obtain full paid gift memberships for a minimal payment. No customer or member data was exposed, and the issue could not be used to steal money from a site or its members.\n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from [v6.27.0](https://github.com/TryGhost/Ghost/releases/tag/v6.27.0) up to [v6.43.1](https://github.com/TryGhost/Ghost/releases/tag/v6.43.1).\n\n### Patches\n\n[v6.44.0](https://github.com/TryGhost/Ghost/releases/tag/v6.44.0) contains a fix for this issue. \n\n### How to update\n\nFor self-hosters using Docker, find [Docker\u2019s official Ghost image on Docker Hub](https://hub.docker.com/_/ghost) and follow the documentation on [updating a Docker-based Ghost instance](https://docs.ghost.org/install/docker#updating-ghost).\n\nFor self-hosters using Ghost-CLI, see the documentation for [updating Ghost to the latest version](https://docs.ghost.org/update).\n\n### Workarounds\n\nIf upgrading immediately is not possible, you can remove the vulnerable checkout path by disabling the donations feature in Ghost Admin under Settings \u2192 Membership \u2192 Tips \u0026 donations until the upgrade is applied.\n\n### References\n\nGhost thanks sane100400 and [p4p3r](https://hackerone.com/p4p3r_hak) for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email Ghost at [security@ghost.org](mailto:security@ghost.org).",
  "id": "GHSA-xm43-3m56-w3wf",
  "modified": "2026-08-04T21:57:48Z",
  "published": "2026-08-04T21:57:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-xm43-3m56-w3wf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59817"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/pull/28351"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/pull/28352"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/commit/cab716cd015ac04b7ee50c7a405478d97bc7b1e0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TryGhost/Ghost/commit/ee7b991b466a7849c70f9d1caed8e491ee4113c6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/TryGhost/Ghost"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Ghost: Paid gift memberships obtainable at minimal cost via the donations feature"
}

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.

Detection rules are retrieved from Rulezet.

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

CVE-2026-59817 (GCVE-0-2026-59817)

bit-ghost-2026-59817

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-59817

GHSA-XM43-3M56-W3WF

Impact

Vulnerable versions

Patches

How to update

Workarounds

References

For more information

Tags

Sightings

Nomenclature

Related by attack behaviour