> CVE-2026-42239 [HIGH]

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PUBLISHED
2026-05-07 20:16
MODIFIED
2026-05-07 20:35
CVSS_SCORE V3
8.1
EPSS (Prob. Exploit)
0.28%
Top 79.0%
DATA SOURCES:
NVD đź”— 2026-05-07 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-08 GITHUB đź”— 2026-10-29 OSV đź”— 2026-11-02

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
EXPLOITABILITY
1.7
IMPACT
5.8

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
High (H)
Authentifié avec privilèges administratifs
UI (Interaction Utilisateur)
User Interaction
Required (R)
Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-1004

> CWE DETAILED DESCRIPTIONS

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.

> GITHUB SECURITY ADVISORY

GHSA-4f9j-vr4p-642r HIGH

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

AFFECTED PACKAGES:
NPM / @budibase/backend-core
< 3.35.10
Fixed in: 3.35.10

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

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

AFFECTED PACKAGES:
Unknown / Unknown
1791 versions affected
ALIASES:
GHSA-4f9j-vr4p-642r

> HISTORIQUE DES MODIFICATIONS

Première apparition
07/05/2026 20:16
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
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.
Total des modifications: 1 Dernière mise à jour: 5 months ago

> REFERENCES

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