CVE-2026-96259mediumCWE-918

Mattermost server-side request forgery via OAuth endpoints configurable by a System Administrator

10Vexday Risk Score

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

ssvc Trackcvss 5.5

probabilidade de exploração

—

exploração observada

nãonenhuma fonte reporta

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to apply the internal-connection filter to OAuth endpoint requests, which allows a System Administrator to make the server issue requests to internal network addresses and read the responses via the configured OAuth token and userinfo endpoints.. Mattermost Advisory ID: MMSA-2026-00776

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

Produtos afetados

Mattermost · Mattermost

Referências

https://mattermost.com/security-updates