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MEDIUM severity

GHSA-3h96-34p3-xm76 graphql

MEDIUM

GHSA-3h96-34p3-xm76 is a medium-severity (CVSS 5.3) vulnerability in graphql. A fix is available for graphql — see the affected versions and patch details below.

GraphQL-Ruby's Ruby lexer does not count comment tokens for the purposes of max_query_string_tokens

Published
May 5, 2026
Updated
May 5, 2026
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of May 5, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

4 pkgs affected
💎graphql💎graphql💎graphql💎graphql

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

GraphQL-Ruby's max_query_string_tokens configuration didn't count comment tokens against the limit, allowing strings to be processed even after the configured maximum had actually been reached.

In patched versions, the Ruby lexer does count these tokens.

GraphQL-CParser is not affected by this problem.

max_query_string_tokens was introduced in v2.3.1. Each 2.x version has received a new patch release for including a fix.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemsgraphql2.6.0&&< 2.6.12.6.1bundle update graphql --conservative
💎RubyGemsgraphql2.5.0&&< 2.5.262.5.26bundle update graphql --conservative
💎RubyGemsgraphql2.4.0&&< 2.4.182.4.18bundle update graphql --conservative
💎RubyGemsgraphql2.3.1&&< 2.3.232.3.23bundle update graphql --conservative

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for graphql, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update graphql to 2.6.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3h96-34p3-xm76 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-3h96-34p3-xm76 can be triaged on real exposure rather than presence alone.

Tailored to GHSA-3h96-34p3-xm76. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

GraphQL-Ruby's `max_query_string_tokens` configuration didn't count comment tokens against the limit, allowing strings to be processed even after the configured maximum had actually been reached. In patched versions, the Ruby lexer does count these tokens. GraphQL-CParser is not affected by this problem. `max_query_string_tokens` was introduced in v2.3.1. Each 2.x version has received a new patch release for including a fix.
O3 Security · Impact-Aware SCA

Is GHSA-3h96-34p3-xm76 in your dependencies?

O3 Security finds GHSA-3h96-34p3-xm76 across RubyGems dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

GHSA-3h96-34p3-xm76: graphql (Medium 5.3) | O3 Security