WPGraphQL Smart Cache before 2.3.3 contains an uncontrolled resource consumption vulnerability that allows unauthenticated attackers to persist unlimited query documents via the Automatic Persisted Query handler. Attackers can send distinct queries with matching SHA-256 queryId values, including batched operations, to grow the wp_posts table without bound and degrade database performance.
https://github.com/wp-graphql/wp-graphql/security/advisories/GHSA-5p5r-f66g-r4vp
https://github.com/wp-graphql/wp-graphql/releases/tag/wp-graphql-smart-cache%2Fv2.3.3
https://github.com/wp-graphql/wp-graphql/commit/80c021c42f4d4969e1b41760a08b4faf3c544a9e
Published: 2026-10-30
Updated: 2026-10-30
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 5.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Severity: Medium
Base Score: 6.9
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Severity: Medium