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.
Published: 2026-05-07
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4f9j-vr4p-642r Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover
History

Thu, 07 May 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Budibase
Budibase budibase
Vendors & Products Budibase
Budibase budibase

Thu, 07 May 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 07 May 2026 19:30:00 +0000

Type Values Removed Values Added
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.
Title Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover
Weaknesses CWE-1004
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N'}


Subscriptions

Budibase Budibase
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-07T19:39:45.605Z

Reserved: 2026-04-25T05:37:12.118Z

Link: CVE-2026-42239

cve-icon Vulnrichment

Updated: 2026-05-07T19:39:41.873Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-07T20:16:44.097

Modified: 2026-05-07T20:35:58.117

Link: CVE-2026-42239

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T21:15:11Z

Weaknesses