Beveiligingsadvies

CVE-2026-6339

CVE-kwetsbaarheidsdetails - eXtreme Datacenter Security Operations

Gepubliceerd 2026-05-18 08:05:30

Laatst bijgewerkt 2026-05-18 12:42:01

Toegewezen door Mattermost

CVSS-score 4.3

Status PUBLISHED

Beschrijving

Mattermost versions 11.5.x <= 11.5.1, 11.4.x <= 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost Advisory ID: MMSA-2026-00636

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