CVE-2026-3473mediumCWE-639

Improper file ownership validation in the Boards API allows unauthorised file access

13Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 5.9epss 0.1%

probabilidade de exploração

0.1%top 95% das CVEs

exploração observada

nãonenhuma fonte reporta

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boards API requests using valid file IDs.. Mattermost Advisory ID: MMSA-2026-00620

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

Produtos afetados

Mattermost · Mattermost

Referências

https://mattermost.com/security-updates