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CVE-2026-53946

MEDIUM
5.4
CVSS 3.1
Description
Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, when re-rendering posts, Ghost would refetch missing image dimensions by issuing an outbound HTTP request to the URL stored on an image card — without restricting that URL to trusted image hosts. An authenticated staff user able to create or edit posts could therefore point an image card at an attacker-chosen host and cause the Ghost server to request it on their behalf, including hosts on internal networks or cloud instance metadata endpoints that would not normally be reachable from the public internet. This vulnerability is fixed in 6.21.1.

Metadata

CVE ID
CVE-2026-53946
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-11 15:50 UTC
Published
2026-06-24 18:08 UTC
Last updated
2026-06-24 18:08 UTC
Primary CWE
CWE-918
CWE-918: Server-Side Request Forgery (SSRF)
Vendor / Product
TryGhost / Ghost
Sources
cve.org  ·  NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Affected products (1)
VendorProductPlatformVersions
TryGhost Ghost — >= 6.19.4, < 6.21.1
Weakness (CWE)
CWESourceDescription
CWE-918 cna CWE-918: Server-Side Request Forgery (SSRF)
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.4 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References (1)
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