Ghost: Server-Side Request Forgery Mitigation Issue (CVE-2026-70595)
### Impact A validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network. A successful attack would not result in any response data being returned. ### Vulnerable versions This vulnerability is present in Ghost from v6.26.0 up to v6.54.0. ### Patches v6.54.1 contains a fix for this issue. ### How to update For self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). ### References Ghost thanks Hwang Seyeon for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email Ghost at [[email protected]](mailto:[email protected]).
AI Analysis
Technical Summary
CVE-2026-70595 is a server-side request forgery (SSRF) vulnerability in the Ghost blogging platform affecting versions from 6.26.0 up to but not including 6.54.1. Due to a validation flaw, unauthenticated attackers could leverage features like Webmentions to initiate limited HTTP requests to internal network hosts of the Ghost server. Although the attacker cannot obtain response data, this behavior could potentially be used to probe internal services. The vulnerability has been addressed in Ghost version 6.54.1.
Potential Impact
An unauthenticated attacker can cause the Ghost server to make HTTP requests to internal network hosts, potentially allowing internal network reconnaissance or interaction with internal services. No response data is returned to the attacker, limiting the impact. There is no indication of data disclosure or service disruption from this vulnerability.
Mitigation Recommendations
A patch is available in Ghost version 6.54.1. Users should update to this version to remediate the vulnerability. Self-hosters using Docker can update via the official Ghost Docker image and follow the documented update procedures. Ghost-CLI users should follow the official update documentation. No additional mitigation steps are required beyond applying the official fix.
Ghost: Server-Side Request Forgery Mitigation Issue (CVE-2026-70595)
Description
### Impact A validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network. A successful attack would not result in any response data being returned. ### Vulnerable versions This vulnerability is present in Ghost from v6.26.0 up to v6.54.0. ### Patches v6.54.1 contains a fix for this issue. ### How to update For self-hosters using Docker, find [Docker's official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). If your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). ### References Ghost thanks Hwang Seyeon for disclosing this vulnerability responsibly. ### For more information If you have any questions or comments about this advisory, email Ghost at [[email protected]](mailto:[email protected]).
CVSS v3.1
Score 4.0medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70595 is a server-side request forgery (SSRF) vulnerability in the Ghost blogging platform affecting versions from 6.26.0 up to but not including 6.54.1. Due to a validation flaw, unauthenticated attackers could leverage features like Webmentions to initiate limited HTTP requests to internal network hosts of the Ghost server. Although the attacker cannot obtain response data, this behavior could potentially be used to probe internal services. The vulnerability has been addressed in Ghost version 6.54.1.
Potential Impact
An unauthenticated attacker can cause the Ghost server to make HTTP requests to internal network hosts, potentially allowing internal network reconnaissance or interaction with internal services. No response data is returned to the attacker, limiting the impact. There is no indication of data disclosure or service disruption from this vulnerability.
Mitigation Recommendations
A patch is available in Ghost version 6.54.1. Users should update to this version to remediate the vulnerability. Self-hosters using Docker can update via the official Ghost Docker image and follow the documented update procedures. Ghost-CLI users should follow the official update documentation. No additional mitigation steps are required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x5mm-wm4g-j5xv
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-70595"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a73572cbf8831d53913cb27
Added to database: 08/05/2026, 15:30:52 UTC
Last enriched: 08/05/2026, 15:33:01 UTC
Last updated: 08/06/2026, 02:06:37 UTC
Views: 4
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