CVE-2026-42239
CVE-2026-42239 · Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 8.1 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
budibase
- Versions
- < 3.35.10: Affected
No fix published
@budibase/backend-core npm
- Affected ranges
- SEMVER: < 3.35.10
Update to 3.35.10