CVE-2026-103291: Server-Side Request Forgery (SSRF) in TryGhost Ghost
Ghost versions from 3.20.2 before 6.51.0 contain a server-side request forgery vulnerability in image dimension refetching that allows authenticated staff users to trigger outbound HTTP requests to arbitrary URLs. Attackers can point image cards at attacker-controlled hosts or internal network endpoints to access metadata services and internal resources unavailable from the public internet.
AI Analysis
Technical Summary
CVE-2026-103291 is a server-side request forgery vulnerability affecting Ghost versions >=3.20.2 and <6.51.0. The vulnerability exists in the image dimension refetching functionality, allowing authenticated staff users to trigger outbound HTTP requests to arbitrary URLs. This can be abused to access internal network endpoints or metadata services that are otherwise inaccessible from the public internet.
Potential Impact
An attacker with authenticated staff privileges can leverage this SSRF vulnerability to make the Ghost server perform HTTP requests to arbitrary destinations. This may expose internal services, metadata endpoints, or other sensitive internal resources that are not publicly reachable, potentially leading to information disclosure or further internal network attacks. The CVSS 4.0 base score is 5.3, indicating a medium severity impact.
Mitigation Recommendations
A fix is available in Ghost version 6.51.0 and later. Users should upgrade to version 6.51.0 or newer to remediate this vulnerability. No additional mitigation guidance is provided, and no indication exists that the vulnerability is already mitigated without patching.
CVE-2026-103291: Server-Side Request Forgery (SSRF) in TryGhost Ghost
Description
Ghost versions from 3.20.2 before 6.51.0 contain a server-side request forgery vulnerability in image dimension refetching that allows authenticated staff users to trigger outbound HTTP requests to arbitrary URLs. Attackers can point image cards at attacker-controlled hosts or internal network endpoints to access metadata services and internal resources unavailable from the public internet.
CVSS v4.0
Score 5.3medium
Affected software
TryGhost
Ghost
pkg:github/tryghost/GhostRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103291 is a server-side request forgery vulnerability affecting Ghost versions >=3.20.2 and <6.51.0. The vulnerability exists in the image dimension refetching functionality, allowing authenticated staff users to trigger outbound HTTP requests to arbitrary URLs. This can be abused to access internal network endpoints or metadata services that are otherwise inaccessible from the public internet.
Potential Impact
An attacker with authenticated staff privileges can leverage this SSRF vulnerability to make the Ghost server perform HTTP requests to arbitrary destinations. This may expose internal services, metadata endpoints, or other sensitive internal resources that are not publicly reachable, potentially leading to information disclosure or further internal network attacks. The CVSS 4.0 base score is 5.3, indicating a medium severity impact.
Mitigation Recommendations
A fix is available in Ghost version 6.51.0 and later. Users should upgrade to version 6.51.0 or newer to remediate this vulnerability. No additional mitigation guidance is provided, and no indication exists that the vulnerability is already mitigated without patching.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-30T10:59:26.443Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abe7497a43b0b3b89bd1d1c
Added to database: 10/01/2026, 14:56:23 UTC
Last enriched: 10/01/2026, 15:23:59 UTC
Last updated: 10/01/2026, 20:49:41 UTC
Views: 4
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