CVE-2026-1963
Published: 05 February 2026
Summary
CVE-2026-1963 is a medium-severity Incorrect Privilege Assignment (CWE-266) vulnerability in Wekan Project Wekan. Its CVSS base score is 6.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 8.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Supervision and review of access control activities directly detects and remediates improper access configurations or usages.
Defining account types, requiring approvals for creation, specifying authorizations, monitoring usage, and reviewing accounts directly prevents improper access control by ensuring only authorized accounts exist and are used.
The control requires explicit definition of separated access authorizations, making incorrect privilege assignments that bundle conflicting duties harder to implement.
Ensures privileges are assigned only as necessary rather than incorrectly over-granted.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.
Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.
By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper access controls in public-facing WeKan web app enable remote exploitation by low-priv authenticated users for unauthorized attachment data manipulation.
NVD Description
A vulnerability was found in WeKan up to 8.20. This affects an unknown function of the file models/attachments.js of the component Attachment Storage. The manipulation results in improper access controls. The attack may be launched remotely. Upgrading to version 8.21…
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mitigates this issue. The patch is identified as c413a7e860bc4d93fe2adcf82516228570bf382d. Upgrading the affected component is advised.
Deeper analysisAI
CVE-2026-1963 is a vulnerability in WeKan open-source kanban board software versions up to 8.20, specifically affecting an unknown function within the file models/attachments.js of the Attachment Storage component. It stems from improper access controls (mapped to CWE-266 and CWE-284), allowing unauthorized manipulation of attachments. The issue carries a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L), indicating medium severity with network accessibility and low attack complexity.
An authenticated attacker with low privileges can exploit this vulnerability remotely without user interaction. Successful exploitation enables limited impacts, including low-level disclosure of confidential information, modification of data, and denial of service on attachments, potentially compromising board data integrity in multi-user environments.
Mitigation is available via upgrade to WeKan version 8.21, which includes the fixing commit c413a7e860bc4d93fe2adcf82516228570bf382d. Security practitioners should prioritize updating the affected Attachment Storage component, with details in the WeKan GitHub repository, release notes, and related advisories.
Details
- CWE(s)