CVE-2026-42239

HighCVSS 8.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-1004

Affected software

No affected versions have been published.

Timeline

Published: May 7, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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