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EUVD-2026-31429

🗓️ 22 May 2026 10:27:02Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 45 Views

Mattermost versions fail to validate file ownership, allowing authenticated users to download others' files via Boards API.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-3473
22 May 202610:27
–attackerkb
bdu_fstec
BDU FSTEC
Boards API Focalboard Unauthorized Access
1 Jun 202600:00
–bdu_fstec
circl
Circl
CVE-2026-3473
22 May 202612:49
–circl
cnnvd
CNNVD
Mattermost 安全漏洞
22 May 202600:00
–cnnvd
cve
CVE
CVE-2026-3473
22 May 202610:27
–cve
cvelist
Cvelist
CVE-2026-3473 Improper file ownership validation in the Boards API allows unauthorised file access
22 May 202610:27
–cvelist
github
Github Security Blog
Mattermost doesn't validate file ownership and access control
26 May 202613:30
–github
mend
Mend
CVE-2026-3473
22 May 202610:27
–mend
nvd
NVD
CVE-2026-3473
22 May 202611:16
–nvd
osv_ghsa
osv_ghsa
GHSA-7PF2-9C95-W332 Mattermost doesn't validate file ownership and access control
26 May 202613:30
–osv_ghsa
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "ad79467f-953b-3ab3-b68c-b1e0012af563",
        "vendor": {
          "name": "Mattermost"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "36458d03-d255-387e-84a4-741a78ef7bde",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "10.11.0 ≤10.11.14"
      },
      {
        "id": "b57ffdec-aebe-300b-8c1f-579b7557eff7",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "11.5.0 ≤11.5.3"
      },
      {
        "id": "d33ffc14-1d12-3830-aa4d-8275c28d4c5c",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "11.6.0 ≤11.6.0"
      },
      {
        "id": "e8463b17-1ef2-3897-af5e-46920ef8fb9a",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "11.4.0 ≤11.4.4"
      }
    ]
  }
]

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22 May 2026 12:12Current
7.3High risk
Vulners AI Score7.3
CVSS 3.15.9 - 7.1
EPSS0.00248
SSVC
45