# Ghost: Invite Token Disclosure in Ghost Admin API

Advisory record · `GHSA-v6q3-xqxm-6f5v`

- **Identifiers:** `GHSA-v6q3-xqxm-6f5v` · `BIT-ghost-2026-104416` · `BIT-ghost-2026-105675` · `CVE-2026-104416` · `CVE-2026-105675`
- **State:** Confirmed
- **Severity:** CVSS 7.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-203](https://cwe.mitre.org/data/definitions/203.html) · [CWE-943](https://cwe.mitre.org/data/definitions/943.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md) · [Other injection](https://agentprime.io/advisories/tag/injection.md)
- **Published:** 7 Oct 2026
- **Updated:** 13 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 7 Oct 2026, 20:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `ghost` (npm): affected `>=4.39.0, <6.64.0`; fixed in `6.64.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Ghost npm package, versions 4.39.0 up to but not including 6.64.0, exposes the secret tokens of pending staff invites through the Admin API. An attacker needs a staff account with permission to view staff invites, and can use a disclosed token to accept an invite for a higher-privileged role. Upgrade ghost to version 6.64.0 or later.

Written 31 Oct 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.7 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (VulnCheck)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0040, the 33rd percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:33 UTC: First seen by agentprime
- 31 Oct 2026, 13:33 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-v6q3-xqxm-6f5v)

## Sources

- [GitHub Advisory Database: GHSA-v6q3-xqxm-6f5v](https://github.com/advisories/GHSA-v6q3-xqxm-6f5v)
- [OSV: GHSA-v6q3-xqxm-6f5v](https://osv.dev/vulnerability/GHSA-v6q3-xqxm-6f5v)
- <https://github.com/TryGhost/Ghost/security/advisories/GHSA-v6q3-xqxm-6f5v>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-105675>
- <https://github.com/TryGhost/Ghost/pull/30760>
- <https://github.com/TryGhost/Ghost/commit/4fb587e4d49667f929b87f7d6a873ae5e9cc087f>
- <https://github.com/TryGhost/Ghost>
- <https://github.com/TryGhost/Ghost/releases/tag/v6.64.0>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-v6q3-xqxm-6f5v>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-v6q3-xqxm-6f5v/>. Everything for agents: <https://agentprime.io/llms.txt>.