What’s Vulnerable › Vulnerabilities

CVE-2026-105645: Ghost: Regular Expression Denial of Service in External Media Inliner

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-05 · updated 2026-10-06
• Weakness: CWE-1333

Description

Ghost is a Node.js content management system. From 5.37.0 until 6.67.0, a crafted request to the external media inliner could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.

Affected products

• TryGhost Ghost: from 5.37.0, < 6.67.0

References

• https://github.com/TryGhost/Ghost/commit/88ae6d6d56f8a239cb38a8c89de02f034f50e2ce
• https://github.com/TryGhost/Ghost/issues/31058
• https://github.com/TryGhost/Ghost/releases/tag/v6.66.0
• https://github.com/TryGhost/Ghost/security/advisories/GHSA-9m4w-fmjw-fvjq

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