CVE-2026-42239

HIGH EPSS 20.1%
Published May 7, 20261mo ago · Modified Jun 17, 20262w ago
8.1 CVSS 3.1
High
Find Similar
Published May 7, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.1
Exploitability
1.7
Impact
5.8
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
20.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-1004

Affected Products 1

VendorProductVersionRange
budibasebudibase* <3.35.10

References 2

  • github.com https://github.com/Budibase/budibase/releases/tag/3.35.10
    PatchRelease Notes
  • github.com https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r
    ExploitMitigationVendor Advisory

Remediation

  • github.com https://github.com/Budibase/budibase/releases/tag/3.35.10
    PatchRelease Notes