Medium severity4.0NVD Advisory· Published Jun 24, 2026· Updated Jun 25, 2026
CVE-2026-53945
CVE-2026-53945
Description
Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. This vulnerability is fixed in 6.21.1.
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Affected products
2Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-ch52-px8q-f22jghsaADVISORY
- github.com/TryGhost/Ghost/commit/07d604100eb3df5c9b382fce6232928c96329448ghsa
- github.com/TryGhost/Ghost/pull/26754ghsa
- github.com/TryGhost/Ghost/releases/tag/v6.21.1ghsa
- github.com/TryGhost/Ghost/security/advisories/GHSA-ch52-px8q-f22jnvd
- nvd.nist.gov/vuln/detail/CVE-2026-53945ghsa
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