Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-63421— Keystone: `graphql.maxTake` bypass with negative `take`

Quick assessment

Affected
keystonejs keystone
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

keystonejs Keystone是keystonejs团队开源的一款内容管理与组件化开发框架。 keystonejs Keystone 6.5.3之前版本存在安全漏洞，该漏洞源于findMany解析器未正确验证take参数，将带符号的take参数与graphql.maxTake直接比较，可能导致远程未经身份验证的GraphQL客户端通过提供负值绕过限制，返回超出预期的记录数，从而耗尽服务资源。

CVSS 7.5 · High EPSS 0.67% · P51

Affected Version Matrix 1

VendorProduct Version RangeStatus
keystonejs keystone < 6.5.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-63421

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Keystone: `graphql.maxTake` bypass with negative `take`
Source: CVE Program / CVE List V5
Vulnerability Description
Keystone is a content management system for Node.js. Prior to 6.5.3, the findMany resolver in packages/core/src/lib/core/queries/resolvers.ts compares the signed take argument directly with graphql.maxTake, allowing a remote unauthenticated GraphQL client to provide a negative take value whose magnitude exceeds the configured bound. The bypass also applies to relationship queries and can return more records than the developer intended, potentially exhausting service resources. This issue is fixed in version 6.5.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
keystonejs Keystone 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
keystonejs Keystone是keystonejs团队开源的一款内容管理与组件化开发框架。 keystonejs Keystone 6.5.3之前版本存在安全漏洞，该漏洞源于findMany解析器未正确验证take参数，将带符号的take参数与graphql.maxTake直接比较，可能导致远程未经身份验证的GraphQL客户端通过提供负值绕过限制，返回超出预期的记录数，从而耗尽服务资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
keystonejs keystone < 6.5.3 -

II. Public POCs for CVE-2026-63421

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5941 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-63421

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-63421 (1)

Vendor Advisories for CVE-2026-63421 (1)

Vendor Pages for CVE-2026-63421 (1)

IV. Related Vulnerabilities

Same product: keystone
Same vendor: keystonejs
Same weakness: CWE-20

V. Comments for CVE-2026-63421

No comments yet

Leave a comment