# Strawberry GraphQL: Synchronous permission checks can treat an awaitable authorization result as truthy

Advisory record · `GHSA-pfvf-fwfp-25mp`

- **Identifiers:** `GHSA-pfvf-fwfp-25mp` · `CVE-2026-107728` · `PYSEC-2026-4303`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-863](https://cwe.mitre.org/data/definitions/863.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md)
- **Published:** 9 Oct 2026
- **Updated:** 15 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 9 Oct 2026, 14:07 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `strawberry-graphql` (PyPI): affected `>=0.217.0, <0.326.1`; fixed in `0.326.1`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Strawberry GraphQL versions from 0.217.0 before 0.326.1 are affected. A custom permission whose has_permission is a plain def returning an awaitable is treated as allowing access, so a protected field with a synchronous resolver can run even when the permission should deny it. Exploitation depends on the application using that permission shape, and the source does not describe any attacker-side requirements beyond sending a request to the affected field. Upgrade to version 0.326.1, which now raises an error instead of granting access.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0045, the 39th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:08 UTC: First seen by agentprime
- 31 Oct 2026, 14:08 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-pfvf-fwfp-25mp)

## Sources

- [GitHub Advisory Database: GHSA-pfvf-fwfp-25mp](https://github.com/advisories/GHSA-pfvf-fwfp-25mp)
- [OSV: GHSA-pfvf-fwfp-25mp](https://osv.dev/vulnerability/GHSA-pfvf-fwfp-25mp)
- <https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-pfvf-fwfp-25mp>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-107728>
- <https://github.com/strawberry-graphql/strawberry/pull/4605>
- <https://github.com/strawberry-graphql/strawberry/commit/2ebb79796c0e5ebb43cae1abd2b5a21363b1c00e>
- <https://github.com/strawberry-graphql/strawberry>
- <https://github.com/strawberry-graphql/strawberry/releases/tag/0.326.1>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-pfvf-fwfp-25mp>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-pfvf-fwfp-25mp/>. Everything for agents: <https://agentprime.io/llms.txt>.