VDB-421639 · CVE-2026-111920 · EUVD-2026-103288

go-vikunja Vikunja 2.6.0 Project Access project_access.go getProjectAccessForUser access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.2	$0-$5k	3.10+

Summaryinfo

A vulnerability, which was classified as problematic, has been found in go-vikunja Vikunja 2.6.0. This impacts the function getProjectAccessForUser of the file pkg/models/project_access.go of the component Project Access. This manipulation causes access control. The identification of this vulnerability is CVE-2026-111920. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in go-vikunja Vikunja 2.6.0. It has been declared as problematic. Affected by this vulnerability is the function getProjectAccessForUser of the file pkg/models/project_access.go of the component Project Access. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect integrity. The summary by CVE is:

Vikunja 2.6.0 contains a broken access control flaw in getProjectAccessForUser (pkg/models/project_access.go), which resolves a user's effective project permission as the maximum over the project tree, silently overriding explicit lower-permission shares on sub-projects. A collaborator with write access on a parent project but read-only access to a child project can modify the child project's tasks and content.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-111920 since 10/17/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/17/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-103288). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

go-vikunja

Name

Vikunja

Version

2.6.0

Website

Product: https://github.com/go-vikunja/vikunja/

CPE 2.3info

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CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/17/2026 Advisory disclosed
10/17/2026 +0 days CVE reserved
10/17/2026 +0 days VulDB entry created
10/17/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Not defined

CVE: CVE-2026-111920 (🔒)
GCVE (CVE): GCVE-0-2026-111920
GCVE (VulDB): GCVE-100-421639
EUVD: 🔒

Entryinfo

Created: 10/17/2026 21:41
Updated: 10/17/2026 22:34
Changes: 10/17/2026 21:41 (76), 10/17/2026 22:34 (2)
Complete: 🔍
Cache ID: 216::103