{"@context":"https://openvex.dev/ns/v0.2.0","@id":"https://database.harborguard.co/cve/CVE-2026-6961/vex.json","author":"HarborGuard Database","role":"Document Creator","timestamp":"2026-06-16T13:17:18.192Z","version":1,"tooling":"HarborGuard Database (https://database.harborguard.co)","statements":[{"vulnerability":{"name":"CVE-2026-6961","@id":"https://www.cve.org/CVERecord?id=CVE-2026-6961","description":"Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server's filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661"},"products":[{"@id":"cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*","identifiers":{"cpe23":"cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*"}}],"status":"affected","action_statement":"Update to a fixed version: 10.11.16, 10.11.17, 11.5.5, 11.6.2, 11.7.0.","timestamp":"2026-06-16T13:17:18.192Z"}]}