High 8.1Published May 7, 2026

CVE-2026-42239Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover

Updated under an hour ago (Oct 28, 2026, 6:00 AM ET)

Does this affect you?

It affects budibase. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for budibase

Exploited in the last 30 days

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 (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-1004
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: May 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Budibase budibase budibase:budibase (from the name)	before 3.35.10	CNA record
budibase budibase budibase:budibase	before 3.35.10	NVD

References

References

https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/Budibase/budibase/releases/tag/3.35.10	x-refsource-misc, patch, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.