CVE-2026-103287: Ghost 1.18.0 before 6.27.0 Server-Side Request Forgery via Webhook

Severity: low (CVSS 2.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-06
Weakness: CWE-918

Description

Ghost versions 1.18.0 before 6.27.0 contain a server-side request forgery vulnerability in the webhooks feature that allows staff users to probe internal hosts. Attackers with staff privileges can craft webhook requests to access internal network resources from the Ghost server.

Affected products

TryGhost Ghost: from 1.18.0 before 6.27.0 — fixed in 6.27.0

How to fix

Upgrade to a fixed version: TryGhost Ghost 6.27.0. Check the vendor advisory for mitigations.

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-354h-gmhv-mr9c
https://www.vulncheck.com/advisories/ghost-1.18.0-before-6.27.0-server-side-request-forgery-via-webhook

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