Vulnerability · Published Sep 23, 2026 · Assigned by GitHub_M

CVE-2026-88974WPGraphQL: Contributor can publish and modify posts without the required capabilities via updatePost

Medium 5.4

In plain English

A medium-severity incorrect authorization in wp-graphql from wp-graphql. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.4%top 67.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

WPGraphQL provides a GraphQL API for WordPress sites. Prior to 2.22.2, the updatePost mutation in src/Mutation/PostObjectUpdate.php checks only the collection-level edit_posts capability and the post author, but does not enforce the object-level edit_post capability or require publish_posts for public status transitions. An authenticated Contributor can therefore publish the Contributor's own draft without editorial approval or modify the Contributor's previously published post despite lacking edit_published_posts, while posts owned by other authors remain protected. This issue is fixed in version 2.22.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	wp-graphql/wp-graphql	no fix listed	GHSA-5mmc-8pc9-wggg

Affected products (as reported)

Vendor	Product	Versions
wp-graphql	wp-graphql	< 2.22.2

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References

https://github.com/wp-graphql/wp-graphql/security/advisories/GHSA-5mmc-8pc9-wggg x_refsource_CONFIRM
https://github.com/wp-graphql/wp-graphql/pull/4270 x_refsource_MISC
https://github.com/wp-graphql/wp-graphql/commit/55441663eaa33c3f2e05de038c8286c845916461 x_refsource_MISC
https://github.com/wp-graphql/wp-graphql/releases/tag/wp-graphql%2Fv2.22.2 x_refsource_MISC