CVE-2026-42239 PUBLISHED

Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover

Assigner: GitHub_M
Reserved: 25.04.2026 Published: 07.05.2026 Updated: 07.05.2026

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

Product Status

Vendor Budibase
Product budibase
Versions
  • Version < 3.35.10 is affected

References

Problem Types

  • CWE-1004: Sensitive Cookie Without 'HttpOnly' Flag CWE