CVSS 3.1
8.1 highCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:NCVE-2026-42239
High (8.1) in budibase budibase. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in @budibase/backend-core 3.35.10.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1004
- Published
- Modified
- Record from
- the NVD, synced
Affected
- budibase:budibase
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4f9j-vr4p-642r | npm | @budibase/backend-core | <3.35.10 | 3.35.10 |