What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-04 · updated 2026-07-22
• Weakness: CWE-200

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.

Affected products

• strawberry-graphql strawberry: from 0.288.4 before 0.315.4 — fixed in 0.315.4

How to fix

Upgrade to a fixed version: strawberry-graphql strawberry 0.315.4. Check the vendor advisory for mitigations.

References

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

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