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CVE-2026-12882

🗓️ 14 Sep 2026 10:30:39Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 35 Views

DoS in Mattermost <= 11.9.0 via Markdown autolinks with unmatched trailing parentheses.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
cvelist
Cvelist
CVE-2026-12882 Mattermost Markdown autolink parsing denial of service
14 Sep 202610:30
–cvelist
euvd
EUVD
EUVD-2026-77363
14 Sep 202610:30
–euvd
mend
Mend
CVE-2026-12882
14 Sep 202610:30
–mend
nvd
NVD
CVE-2026-12882
14 Sep 202611:17
–nvd
osv_mini
osv_mini
MINI-J373-P25G-MX8M
8 Oct 202620:47
–osv_mini
osv_mini
osv_mini
MINI-W4PM-G8JP-7Q39
8 Oct 202620:47
–osv_mini
ptsecurity
Positive Technologies
PT-2026-91142
14 Sep 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-12882: Inefficient Algorithmic Complexity
14 Sep 202600:00
–rapid7
vulnrichment
Vulnrichment
CVE-2026-12882 Mattermost Markdown autolink parsing denial of service
14 Sep 202610:30
–vulnrichment
NVD
Vulners
Node
OR
mattermostmattermost_serverRange10.11.0–10.11.23
mattermostmattermost_serverRange11.7.0–11.7.8
mattermostmattermost_serverRange11.8.0–11.8.5
mattermostmattermost_serverRange11.9.0–11.9.1
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.9.0",
        "status": "affected",
        "version": "11.9.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.4",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.7.7",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.22",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "11.10.0",
        "status": "unaffected"
      },
      {
        "version": "11.9.1",
        "status": "unaffected"
      },
      {
        "version": "11.8.5",
        "status": "unaffected"
      },
      {
        "version": "11.7.8",
        "status": "unaffected"
      },
      {
        "version": "10.11.23",
        "status": "unaffected"
      }
    ]
  }
]

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07 Oct 2026 16:23Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.14.3
EPSS0.00367
SSVC
35