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
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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History
Fri, 12 Jun 2026 18:45:00 +0000
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| First Time appeared |
Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
Fri, 12 Jun 2026 18:30:00 +0000
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ssvc
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Fri, 12 Jun 2026 17:15:00 +0000
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| 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 | |
| Title | CVE-2026-6961: Path traversal via unsanitized FileInfo.Name in Mattermost federation sync | |
| Weaknesses | CWE-22 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-06-12T17:17:44.544Z
Reserved: 2026-04-24T15:22:26.743Z
Link: CVE-2026-6961
Updated: 2026-06-12T17:17:41.028Z
Status : Received
Published: 2026-06-12T17:16:27.410
Modified: 2026-06-12T17:16:27.410
Link: CVE-2026-6961
No data.
OpenCVE Enrichment
Updated: 2026-06-12T18:30:31Z