# CVE-2026-103282: Ghost race condition in staff invitation acceptance mechanism

Source: https://junglewise.ai/threats/cve-2026-103282-ghost-versions-0-5-0-before-6-23-0-contain-a-concurrency-issue  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-01. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-103282 · Severity: medium · CVSS 4.3 · Published 2026-10-01

Ghost, a content management system and blogging platform, contains a race condition in its staff invitation system. An attacker can exploit this flaw by sending concurrent requests with the same invitation token to create multiple user accounts from a single invitation, potentially enabling unauthorized account creation and system compromise.

Technologies: [TryGhost Ghost](https://junglewise.ai/threats/technologies/tryghost-ghost). Vendors: [TryGhost](https://junglewise.ai/threats/vendors/tryghost).

## Quick answers

**Is CVE-2026-103282 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103282 being exploited in the wild.

**How severe is CVE-2026-103282?** Medium severity, with a CVSS score of 4.3, published 1 October 2026.

**Which products and versions are affected?** TryGhost Ghost 0.5.0 through 6.22.x.

**Is there a fix for CVE-2026-103282?** Yes: fixed in 6.23.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-103282 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-103282?** Check whether you run TryGhost Ghost at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 6.23.0

## Technical details

A race condition exists in Ghost's staff invitation acceptance endpoint that fails to properly synchronize concurrent requests using the same invitation token. An attacker with knowledge of a valid invitation token can submit multiple simultaneous requests to bypass the single-use validation, resulting in creation of duplicate user accounts. The vulnerability requires low privileges and network access but no user interaction.

## Affected products

- TryGhost Ghost 0.5.0 through 6.22.x

## Timeline

- 2026-08-12: disclosed
- 2026-10-01: advisory

## References

- [https://github.com/TryGhost/Ghost/security/advisories/GHSA-vf9h-87xm-g767](https://github.com/TryGhost/Ghost/security/advisories/GHSA-vf9h-87xm-g767)
- [https://www.vulncheck.com/advisories/ghost-0.5.0-before-6.23.0-multiple-account-creation-via-invite-token](https://www.vulncheck.com/advisories/ghost-0.5.0-before-6.23.0-multiple-account-creation-via-invite-token)

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