8.1

CVE-2026-42239

Exploit

Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Budibase ≫ Budibase Version < 3.35.10
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.28% 0.198
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 8.1 1.7 5.8
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
CWE-1004 Sensitive Cookie Without 'HttpOnly' Flag

The product uses a cookie to store sensitive information, but the cookie is not marked with the HttpOnly flag.

https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r
Vendor Advisory
Exploit
Mitigation
https://github.com/Budibase/budibase/releases/tag/3.35.10
Patch
Release Notes