Package vulnerability, severity high

GraphQL-core has denial of service via memory leak in aborted validations

Published October 30, 2026, updated October 31, 2026

GraphQL-core has denial of service via memory leak in aborted validations. Source: GHSA-mpqx-q82w-9x46 (CVE-2026-119286).

What's affected

• graphql-core (pypi)>=3.3.0a3 <3.3.1

What to do

1. Upgrade graphql-core to 3.3.1 or later.

Check whether you were affected

Pharon tells teams automatically when this affects something they run. To check a machine, run this in Claude Code with the Pharon plugin, in the repository that uses it:

/pharon:check-incident ghsa-mpqx-q82w-9x46

References

• https://osv.dev/vulnerability/GHSA-mpqx-q82w-9x46
• https://github.com/graphql-python/graphql-core/security/advisories/GHSA-mpqx-q82w-9x46
• https://nvd.nist.gov/vuln/detail/CVE-2026-119286
• https://github.com/graphql-python/graphql-core/issues/287
• https://github.com/graphql-python/graphql-core/pull/288
• https://github.com/graphql-python/graphql-core/commit/3c319fd9f4b8f6c9db4189520561bf8dd0e70be9
• https://github.com/graphql-python/graphql-core
• https://github.com/graphql-python/graphql-core/releases/tag/v3.3.1

Notice ghsa-mpqx-q82w-9x46, signed with key feed-prod-2026-10 (Ed25519). The Pharon CLI verifies the signature before using a notice.