Information disclosure in Strawberry Graphql
CVE-2026-45739
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Strawberry Graphql
- Strawberry-Graphql Strawberry — versions >= 0.288.4, < 0.315.4
Weakness classification (CWE)
References
- github.com/strawberry-graphql/strawberry/security/advisories/GHSA-x97m-qp5c-w9xj (Mitigation, Vendor Advisory)
- github.com/strawberry-graphql/strawberry/issues/4398 (Issue Tracking)
- github.com/strawberry-graphql/strawberry/pull/2842 (Patch, Issue Tracking)
- github.com/strawberry-graphql/strawberry/commit/9315ef80a621ae50ca0bc5c82f560ca… (Patch)
- github.com/strawberry-graphql/strawberry/releases/tag/0.315.4 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-45739?
- CVE-2026-45739 is a low-severity vulnerability in Strawberry Graphql, classified under Information Disclosure. CVSS score: 3.1/10. Published 2026-06-04.
- How severe is CVE-2026-45739?
- Low severity. CVSS v3 base score is 3.1 out of 10.