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CVE-2026-16251 Mattermost local image proxy allows server memory exhaustion via unbounded image response buffering

🗓️ 16 Oct 2026 07:14:59Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 18 Views

Local image proxy in Mattermost allows server memory exhaustion via unbounded buffering.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-16251
16 Oct 202608:07
–circl
cve
CVE
CVE-2026-16251
16 Oct 202607:14
–cve
euvd
EUVD
EUVD-2026-102750
16 Oct 202607:14
–euvd
nvd
NVD
CVE-2026-16251
16 Oct 202608:17
–nvd
ptsecurity
Positive Technologies
PT-2026-115505
16 Oct 202600:00
–ptsecurity
vulnrichment
Vulnrichment
CVE-2026-16251 Mattermost local image proxy allows server memory exhaustion via unbounded image response buffering
16 Oct 202607:14
–vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.10.0",
        "status": "affected",
        "version": "11.10.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.7.9",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.9.1",
        "status": "affected",
        "version": "11.9.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.5",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "version": "11.11.0",
        "status": "unaffected"
      },
      {
        "version": "11.10.1",
        "status": "unaffected"
      },
      {
        "version": "11.7.10",
        "status": "unaffected"
      },
      {
        "version": "11.9.2",
        "status": "unaffected"
      },
      {
        "version": "11.8.6",
        "status": "unaffected"
      }
    ]
  }
]

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16 Oct 2026 07:14Current
CVSS 3.16.5
EPSS0.0028
SSVC
18