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Vulnerabilities

Vulnerability · GHSA-mp59-9rf5-93wr

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

Published Oct 23, 2026 · catalog updated Oct 23, 2026 · Unauthenticated GraphQL cross-site disclosure

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-mp59-9rf5-93wr. A missing EPSS score is not a low risk. Compare Unauthenticated GraphQL cross-site disclosure with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Unauthenticated GraphQL cross-site disclosure).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Version ranges on file
Affected products
composer craftcms/cms

An unauthenticated request against a GraphQL Public Schema whose Sites scope grants only site 1 can read the content of site 2. The schema is explicitly not authorized to read — by selecting the element field with its / argument omitted. The same field with the argument supplied ( ) is correctly denied ( ), and five other legitimate paths to site 2 are also denied for the identical anonymous principal; a positive control (a temporary both-sites token) confirms that those denials are Sites-scope enforcement, not missing data. ### Preconditions * Craft multi-site install (≥2 sites). * A GraphQL schema whose Sites scope omits ≥1 site. * A section enabled for both sites and inside the schema’s Sections scope. * The schema reachable: the Public Schema (anonymous), or any issued restricted token. * No , admin session, or non-default config. * Custom-field bodies diverge per site only for fields set to “Translate for each site” (a documented setting, and the configuration in which per-site content is independent in the first place). ### Impact An unauthenticated internet client can read the content of any site a GraphQL schema is not scoped to, so long as that site shares a section with an in-scope site — in a single request, with zero credentials (no account, no token, no cookie). Report ID: 1936

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • composer craftcms/cms>= 5.0.0, < 5.11.2

How to fix GHSA-mp59-9rf5-93wr

  • Upgrade

    GHSA-mp59-9rf5-93wr lists a fix boundary at 5.11.2. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 5.11.2

  • Advisory

    Open the inventory_github record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-mp59-9rf5-93wr. A missing EPSS score is not a low risk. Compare Unauthenticated GraphQL cross-site disclosure with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with >= 5.0.0, < 5.11.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Craft CMS security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 23, 2026 · Maintainer security tabs

    Detected

    An unauthenticated request against a GraphQL Public Schema whose Sites scope grants only site 1 can read the content of site 2. The schema is explicitly not authorized to read — by selecting the element field with its / argument omitted. The same field with the argument supplied ( ) is correctly denied ( ), and five other legitimate paths to site 2 are also denied for the identical anonymous princ

Sources

  • Maintainer security tabsVendor advisoryGHSA-mp59-9rf5-93wr

    An unauthenticated request against a GraphQL Public Schema whose Sites scope grants only site 1 can read the content of site 2. The schema is explicitly not authorized to read — by selecting the element field with its / argument omitted. The same field with the argument supplied ( ) is correctly denied ( ), and five other legitimate paths to site 2 are also denied for the identical anonymous princ

    github.com

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 1, 2026