# Unauthenticated GraphQL cross-site disclosure via "localized" field bypasses schema Sites scope

Advisory record · `GHSA-mp59-9rf5-93wr`

- **Identifiers:** `GHSA-mp59-9rf5-93wr`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Weakness (CWE):** [CWE-862](https://cwe.mitre.org/data/definitions/862.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 23 Oct 2026
- **Updated:** 23 Oct 2026
- **Reviewed by a person:** No

[Published by the maintainers](https://github.com/craftcms/cms/security/advisories/GHSA-mp59-9rf5-93wr) · not yet reviewed by GitHub. The craftcms/cms maintainers published this as a GitHub repository advisory; GitHub’s reviewed advisory replaces it here when it arrives.

Published by the craftcms/cms maintainers at 23 Oct 2026, 09:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `craftcms/cms` (Packagist): affected `>=5.0.0, <5.11.2`; fixed in `5.11.2`

## 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

- 23 Oct 2026, 09:04 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/craftcms/cms/security/advisories/GHSA-mp59-9rf5-93wr)
- 8 Nov 2026, 20:02 UTC: First seen by agentprime

## Sources

- [GitHub Advisory Database: GHSA-mp59-9rf5-93wr](https://github.com/advisories/GHSA-mp59-9rf5-93wr)
- [OSV: GHSA-mp59-9rf5-93wr](https://osv.dev/vulnerability/GHSA-mp59-9rf5-93wr)
- <https://github.com/craftcms/cms/security/advisories/GHSA-mp59-9rf5-93wr>

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-mp59-9rf5-93wr>, 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-mp59-9rf5-93wr/>. Everything for agents: <https://agentprime.io/llms.txt>.