CVE-2026-42239
Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover
- State
- Published
- Severity
- 8.1 High
- Published
- May 7, 2026
- Updated
- May 7, 2026
- Reserved
- Apr 25, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N | GitHub_M |
Weaknesses
- CWE-1004 Sensitive Cookie Without 'HttpOnly' Flag
Affected Products
| Product | Versions |
|---|---|
budibaseBudibase |
|
References
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