CVE-2026-42239HIGH 8.1EPSS p19.9%

CVE-2026-42239CVE-2026-42239

budibase / budibase

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
EPSS0.28% probability of exploitation · percentile 19.9% · 2026-06-18T12:00:27Z
Published2026-05-07
Last modified2026-06-04

Underlying weaknesses· 1

CWE-1004

References

  1. https://github.com/Budibase/budibase/releases/tag/3.35.10
  2. https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r
  3. https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r

1

TypeTargetConfidenceTier
WeaknessSensitive Cookie Without 'HttpOnly' Flagcwe-10040%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.