High severity8.1NVD Advisory· Published May 7, 2026· Updated Jun 4, 2026
CVE-2026-42239
CVE-2026-42239
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
@budibase/backend-corenpm | < 3.35.10 | 3.35.10 |
Affected products
1Patches
Vulnerability mechanics
References
4- github.com/Budibase/budibase/releases/tag/3.35.10nvdPatchRelease NotesWEB
- github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642rnvdVendor AdvisoryExploitMitigationWEB
- github.com/advisories/GHSA-4f9j-vr4p-642rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-42239ghsaADVISORY
News mentions
0No linked articles in our index yet.