CVE-2026-42239

Budibase is an open-source low-code platform. Prior to version 3.35.10, the budibase:auth cookie containing the JWT session token is set with httpOnly: false at packages/backend-core/src/utils/utils.ts:218. JavaScript can read this cookie via document.cookie. This means every XSS becomes a full account takeover — the attacker steals the JWT and has persistent access to the victim's account. The cookie also lacks secure: true (sent over plaintext HTTP) and sameSite attribute. This issue has been patched in version 3.35.10.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.7 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/Budibase/budibase/releases/tag/3.35.10	Patch Release Notes
https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r	Exploit Mitigation Vendor Advisory
https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-07 20:16

Updated : 2026-06-17 10:47

NVD link : CVE-2026-42239

Mitre link : CVE-2026-42239

CVE.ORG link : CVE-2026-42239

JSON object : View

Products Affected

budibase

budibase

CWE

CWE-1004

Sensitive Cookie Without 'HttpOnly' Flag

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