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CVE-2026-70596· NVD / CVE Program· CNA GitHub_M

Ghost: Cross-Site Scripting in Feature Image Captions

Ghost is a Node.js content management system. From 4.9.0 until 6.54.1, an input validation issue allowed any staff user to create a post with content in feature_image_caption that could be used to hijack another staff user's Ghost Admin session, resulting in privilege escalation. This issue is fixed in 6.54.1.

MediumCVSS 4.3 · v3.1—No exploit Fix available
Published
Aug 5, 2026
Updated
Sep 8, 2026
EPSS
0.3% · 23th percentile
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Report tools

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Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
4.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • TryGhost Ghost

    • >= 4.9.0, < 6.54.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
npmghostfrom 4.9.0 · before 6.54.16.54.1

Same product

tryghost: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-53943Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header
    38Monitor
  • CVE-2026-105642Ghost: Remote Code Execution via Bookmark Card Images
    35Monitor
  • CVE-2026-104418Ghost from 6.10.3 before 6.64.0 RCE via Theme Translation Files
    34Monitor
  • CVE-2026-104414Ghost from 2.5.0 before 6.64.0 Stored XSS via oEmbed Photo Responses
    34Monitor
  • CVE-2026-104413Ghost 5.94.0 before 6.64.0 Stored XSS via Bookmark Card Images
    34Monitor
  • CVE-2026-104411Ghost 6.22.1 before 6.64.0 Stored XSS via Local Storage File Uploads
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
TryGhost Ghost6.54.1 · descriptionVendor (CNA)
npm:ghost6.54.1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-10327757 days apartGhost 2.5.0 before 6.34.0 Untrusted Script Execution via oEmbed
    34Monitor
  • CVE-2026-10329257 days apartGhost 0.5.3 before 6.50.0 Cross-Site Scripting via ghost_head
    34Monitor
  • CVE-2026-10441158 days apartGhost 6.22.1 before 6.64.0 Stored XSS via Local Storage File Uploads
    34Monitor
  • CVE-2026-10441358 days apartGhost 5.94.0 before 6.64.0 Stored XSS via Bookmark Card Images
    34Monitor
  • CVE-2026-10441458 days apartGhost from 2.5.0 before 6.64.0 Stored XSS via oEmbed Photo Responses
    34Monitor
  • CVE-2026-10565061 days apartGhost: Stored XSS via oEmbed Photo Responses
    32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

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

nvd-secondary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records