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EUVD-2026-31431

🗓️ 22 May 2026 10:28:47Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 31 Views

Mattermost versions fail to archive channels before removing persistent notifications, enabling crash via timing.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-4635
22 May 202610:28
–attackerkb
bdu_fstec
BDU FSTEC
Mattermost Notification Handler DoS
1 Jun 202600:00
–bdu_fstec
circl
Circl
CVE-2026-4635
22 May 202612:47
–circl
cnnvd
CNNVD
Mattermost 安全漏洞
22 May 202600:00
–cnnvd
cve
CVE
CVE-2026-4635
22 May 202610:28
–cve
cvelist
Cvelist
CVE-2026-4635 Persistent notification timing attack causing server denial of service
22 May 202610:28
–cvelist
github
Github Security Blog
Mattermost doesn't archive the channel before removing persistent notifications
26 May 202613:30
–github
mend
Mend
CVE-2026-4635
22 May 202610:28
–mend
nvd
NVD
CVE-2026-4635
22 May 202611:16
–nvd
osv-ghsa
osv-ghsa
GHSA-PG7C-462J-GRXV Mattermost doesn't archive the channel before removing persistent notifications
26 May 202613:30
–osv-ghsa
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "fd186497-ae4f-3c30-a2e5-a1ffc85299e4",
        "vendor": {
          "name": "Mattermost"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "2eb1b845-76d9-3763-8f86-b2d8cb4bbf32",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "11.6.0 ≤11.6.0"
      },
      {
        "id": "309cab9e-e547-3814-a467-633e34835da4",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "11.5.0 ≤11.5.3"
      },
      {
        "id": "8917b5b1-03e5-312a-9d22-106c24f5f0c8",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "11.4.0 ≤11.4.4"
      },
      {
        "id": "b9eb66b1-8a04-3ffc-a646-5bb15c12fb82",
        "product": {
          "name": "Mattermost"
        },
        "product_version": "10.11.0 ≤10.11.14"
      }
    ]
  }
]

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22 May 2026 12:06Current
7High risk
Vulners AI Score7
CVSS 3.15.3 - 6.5
EPSS0.00286
SSVC
31