CVE-2026-45342
LinkAce: IDOR in Update Policies Allows Any Authenticated User to Overwrite Other Users' Links, Lists, Tags, and Notes
Description
LinkAce is a self-hosted archive to collect website links. Prior to 2.5.6, LinkAce contains an Insecure Direct Object Reference vulnerability in the authorization policy layer that allows any authenticated user to modify resources owned by other users. The affected resource types are links, lists, tags, and notes. Both the web UI and the REST API are vulnerable. The root cause is in the update() methods of all four model policies: LinkPolicy, LinkListPolicy, TagPolicy, and NotePolicy. Each delegates to an access-check method (e.g., userCanAccessLink()) that returns true for any resource with non-private visibility, regardless of who owns it. This means any registered user can edit any public or internal resource across the entire instance. The delete() methods in the same policy files correctly require ownership via $link->user->is($user), which confirms that update was intended to be owner-only. The same flaw exists in the API layer through AuthorizesUserApiActions::userCanUpdateModel(), which mirrors the broken visibility-only check instead of the ownership check used by userCanDeleteModel(). Bulk edit operations via BulkEditController are also affected. This vulnerability is fixed in 2.5.6.
INFO
Published Date :
May 28, 2026, 10:17 p.m.
Last Modified :
July 21, 2026, 10:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update LinkAce to version 2.5.6.
- Review and secure all resource access controls.
- Ensure updates include ownership checks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45342.
| URL | Resource |
|---|---|
| https://github.com/Kovah/LinkAce/security/advisories/GHSA-cj8f-h888-m57m | |
| https://github.com/Kovah/LinkAce/security/advisories/GHSA-cj8f-h888-m57m |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45342 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45342
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45342 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45342 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Added Translation Title: LinkAce de Kovah, Description: LinkAce es un archivo autoalojado para recopilar enlaces de sitios web. Anterior a la versión 2.5.6, LinkAce contiene una vulnerabilidad de Referencia Directa a Objeto Insegura en la capa de política de autorización que permite a cualquier usuario autenticado modificar recursos propiedad de otros usuarios. Los tipos de recursos afectados son enlaces, listas, etiquetas y notas. Tanto la interfaz de usuario web como la API REST son vulnerables. La causa raíz se encuentra en los métodos update() de las cuatro políticas de modelo: LinkPolicy, LinkListPolicy, TagPolicy y NotePolicy. Cada uno delega en un método de verificación de acceso (por ejemplo, userCanAccessLink()) que devuelve verdadero para cualquier recurso con visibilidad no privada, independientemente de quién sea su propietario. Esto significa que cualquier usuario registrado puede editar cualquier recurso público o interno en toda la instancia. Los métodos delete() en los mismos archivos de política requieren correctamente la propiedad a través de $link->user->is($user), lo que confirma que update estaba destinado a ser solo para el propietario. El mismo fallo existe en la capa de la API a través de AuthorizesUserApiActions::userCanUpdateModel(), que refleja la verificación de solo visibilidad defectuosa en lugar de la verificación de propiedad utilizada por userCanDeleteModel(). Las operaciones de edición masiva a través de BulkEditController también están afectadas. Esta vulnerabilidad se corrige en la versión 2.5.6. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Kovah', 'product': 'LinkAce', 'versions': [{'status': 'affected', 'version': '< 2.5.6'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-45342', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-29T14:45:14.532064Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 29, 2026
Action Type Old Value New Value Added Reference https://github.com/Kovah/LinkAce/security/advisories/GHSA-cj8f-h888-m57m -
New CVE Received by [email protected]
May. 28, 2026
Action Type Old Value New Value Added Description LinkAce is a self-hosted archive to collect website links. Prior to 2.5.6, LinkAce contains an Insecure Direct Object Reference vulnerability in the authorization policy layer that allows any authenticated user to modify resources owned by other users. The affected resource types are links, lists, tags, and notes. Both the web UI and the REST API are vulnerable. The root cause is in the update() methods of all four model policies: LinkPolicy, LinkListPolicy, TagPolicy, and NotePolicy. Each delegates to an access-check method (e.g., userCanAccessLink()) that returns true for any resource with non-private visibility, regardless of who owns it. This means any registered user can edit any public or internal resource across the entire instance. The delete() methods in the same policy files correctly require ownership via $link->user->is($user), which confirms that update was intended to be owner-only. The same flaw exists in the API layer through AuthorizesUserApiActions::userCanUpdateModel(), which mirrors the broken visibility-only check instead of the ownership check used by userCanDeleteModel(). Bulk edit operations via BulkEditController are also affected. This vulnerability is fixed in 2.5.6. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-639 Added Reference https://github.com/Kovah/LinkAce/security/advisories/GHSA-cj8f-h888-m57m