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CVE-2026-6961

CVE-2026-6961: Path traversal via unsanitized FileInfo.Name in Mattermost federation sync PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / productVersions
Mattermost / Mattermostaffected 11.6.0 through 11.6.1; affected 11.5.0 through 11.5.4; affected 10.11.0 through 10.11.15; affected 10.11.0 through 10.11.16; unaffected 11.7.0; unaffected 11.6.2; unaffected 11.5.5; unaffected 10.11.16; unaffected 10.11.17

CWE

CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.