What is the CVSS score of CVE-2026-29053?

CVE-2026-29053 has a CVSS 3.1 base score of 7.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Node.js are affected by CVE-2026-29053?

A critical vulnerability in Ghost CMS (versions 0.7.2-6.19.0) allows attackers to execute arbitrary code on affected servers through malicious theme uploads.. A patch is available.

Is there a public PoC exploit available for CVE-2026-29053?

Yes, a public proof-of-concept exploit is available for CVE-2026-29053. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-29053?

Within 24 hours: Identify and inventory all Ghost CMS deployments and their versions; disable theme upload functionality or restrict to administrative users only. Within 7 days: Implement compensating controls (network segmentation, WAF rules blocking suspicious theme uploads); escalate with Ghost vendor for patch timeline. Within 30 days: Upgrade to patched Ghost version once available, or migrate to alternative CMS if upgrade timeline is unacceptable.

Node.js CVE-2026-29053

HIGH

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2026-03-05 security-advisories@github.com

GHSA-cgc2-rcrh-qr5x

Node.js Ghost

7.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.6 HIGH

AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 05, 2026 - 06:16 nvd

HIGH 7.6

DescriptionGitHub Advisory

Ghost is a Node.js content management system. From version 0.7.2 to 6.19.0, specifically crafted malicious themes can execute arbitrary code on the server running Ghost. This issue has been patched in version 6.19.1.

AnalysisAI

Arbitrary code execution in Ghost CMS versions 0.7.2 through 6.19.0 allows authenticated attackers with theme upload privileges to execute malicious code on the server by crafting specially designed theme files. The vulnerability affects Ghost installations running on Node.js and requires high privileges to exploit, though successful attacks compromise complete server integrity with confidentiality, integrity, and availability impact. No patch is currently available for affected versions.

Technical ContextAI

Affects Ghost. Ghost is a Node.js content management system. From version 0.7.2 to 6.19.0, specifically crafted malicious themes can execute arbitrary code on the server running Ghost. This issue has been patched in version 6.19.1.

RemediationAI

Fixed in version 6.19.1.. Restrict network access to the affected service where possible.

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CVE-2026-29053 vulnerability details – vuln.today

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Node.js CVE-2026-29053

Severity by source

CVSS VectorGitHub Advisory

Lifecycle Timeline

DescriptionGitHub Advisory

AnalysisAI

Technical ContextAI

RemediationAI

More in Node.js

Same weakness CWE-74 – Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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External POC / Exploit Code