CVE-2026-42239

8.1 HIGH
Published: May 07, 2026 Modified: June 04, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/Budibase/budibase/releases/tag/3.35.10
Source: security-advisories@github.com
Patch Release Notes
https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r
Source: security-advisories@github.com
Vendor Advisory Exploit Mitigation
https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Vendor Advisory Exploit Mitigation

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.1 / 10.0
EPSS (Exploit Probability)
0.3%
20th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

budibase