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Medium severity · published Jun 4, 2026
CVE-2026-45739
Strawberry GraphQL: Default GraphiQL may expose HTTP headers in URLs
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ST
strawberry · strawberry-graphql
>= 0.288.4, < 0.315.4 · source: vendor
SG
Strawberry Graphql · Strawberry
0.288.4 before 0.315.4 · source: NVD
Affected product
ST
strawberry
strawberry-graphql
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45739
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45739
Patch
https://github.com/strawberry-graphql/strawberry/commit/9315ef80a621ae50ca0bc5c82f560ca4ee7e47a9
Issue Tracking
https://github.com/strawberry-graphql/strawberry/issues/4398
Issue Tracking
https://github.com/strawberry-graphql/strawberry/pull/2842
Product
https://github.com/strawberry-graphql/strawberry/releases/tag/0.315.4
Mitigation
https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-x97m-qp5c-w9xj
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