CVE-2026-42239
Last modified
CVE-2026-42239 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Budibase | Budibase | < 3.35.10 |
References
- https://github.com/Budibase/budibase/releases/tag/3.35.10Patch, Release Notes
- https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642rExploit, Mitigation, Vendor Advisory
- https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642rExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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