> CVE-2026-40103 [MEDIUM]

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PUBLISHED
2026-04-10 17:17
MODIFIED
2026-04-10 17:17
CVSS_SCORE V3
4.3
EPSS (Prob. Exploit)
0.23%
Top 86.6%
DATA SOURCES:
NVD 🔗 2026-04-10 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-02

> DESCRIPTION

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0.

> 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:L/UI:N/S:U/C:N/I:L/A:N
EXPLOITABILITY
2.8
IMPACT
1.4

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-836

> CWE DETAILED DESCRIPTIONS

CWE-836: Use of Password Hash Instead of Password for Authentication - The product includes a client that computes a hash of a password and sends the hash to another component, which compares the supplied hash to the hash obtained from a data store of password hashes.

> GITHUB SECURITY ADVISORY

GHSA-v479-vf79-mg83 MODERATE

Vikunja: Scoped API tokens with projects.background permission can delete project backgrounds

AFFECTED PACKAGES:
GO / code.vikunja.io/api
< 2.3.0
Fixed in: 2.3.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Vikunja's Scoped API tokens with projects.background permission can delete project backgrounds

AFFECTED PACKAGES:
Unknown / Unknown
43 versions affected
ALIASES:
GHSA-v479-vf79-mg83, GO-2026-5650

> HISTORIQUE DES MODIFICATIONS

Première apparition
10/04/2026 17:17
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-836: Use of Password Hash Instead of Password for Authentication - The product records password hashes in a data store, receives a hash of a password from a client, and compares the supplied hash ...
Nouvelle valeur:
CWE-836: Use of Password Hash Instead of Password for Authentication - The product includes a client that computes a hash of a password and sends the hash to another component, which compares the supp...
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-836: Use of Password Hash Instead of Password for Authentication - The product records password hashes in a data store, receives a hash of a password from a client, and compares the supplied hash ...
Total des modifications: 2 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9...
https://github.com/go-vikunja/vikunja/pull/2584
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83
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