CVE-2026-53944 - Vulnerability Details - OpenCVE

Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products

References

Link	Providers
https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r

History

Wed, 24 Jun 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 24 Jun 2026 18:45:00 +0000

Type	Values Removed	Values Added
Description		Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1.
Title		Ghost: Private IP filtering bypass to make server-side requests to internal services
Weaknesses		CWE-184 CWE-918
References		https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r
Metrics		cvssV3_1 `{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-24T18:10:30.985Z

Updated: 2026-06-24T18:50:17.772Z

Reserved: 2026-06-11T15:50:01.280Z

Link: CVE-2026-53944

Vulnrichment

Updated: 2026-06-24T18:50:14.901Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-06-24T20:00:10Z

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53944", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-11T15:50:01.280Z", "datePublished": "2026-06-24T18:10:30.985Z", "dateUpdated": "2026-06-24T18:50:17.772Z"}, "containers": {"cna": {"title": "Ghost: Private IP filtering bypass to make server-side requests to internal services", "problemTypes": [{"descriptions": [{"cweId": "CWE-184", "lang": "en", "description": "CWE-184: Incomplete List of Disallowed Inputs", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r"}], "affected": [{"vendor": "TryGhost", "product": "Ghost", "versions": [{"version": ">= 6.0.9, < 6.21.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T18:10:30.985Z"}, "descriptions": [{"lang": "en", "value": "Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1."}], "source": {"advisory": "GHSA-wvp2-4qqp-4h3r", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-24T18:50:11.644766Z", "id": "CVE-2026-53944", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-24T18:50:17.772Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53944", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-24T18:50:11.644766Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-24T18:50:14.901Z"}}], "cna": {"title": "Ghost: Private IP filtering bypass to make server-side requests to internal services", "source": {"advisory": "GHSA-wvp2-4qqp-4h3r", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "TryGhost", "product": "Ghost", "versions": [{"status": "affected", "version": ">= 6.0.9, < 6.21.1"}]}], "references": [{"url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r", "name": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r", "tags": ["x_refsource_CONFIRM"]}], "descriptions": [{"lang": "en", "value": "Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-184", "description": "CWE-184: Incomplete List of Disallowed Inputs"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-918", "description": "CWE-918: Server-Side Request Forgery (SSRF)"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T18:10:30.985Z"}}}, "cveMetadata": {"cveId": "CVE-2026-53944", "state": "PUBLISHED", "dateUpdated": "2026-06-24T18:50:17.772Z", "dateReserved": "2026-06-11T15:50:01.280Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-06-24T18:10:30.985Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}