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CVE-2026-4858

🗓️ 21 May 2026 08:12:11Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 14 Views

CVE-2026-4858 enables path traversal in action URL to call arbitrary API with system token.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-4858
21 May 202608:12
attackerkb
Circl
CVE-2026-4858
19 May 202600:51
circl
CNNVD
Mattermost 路径遍历漏洞
21 May 202600:00
cnnvd
Cvelist
CVE-2026-4858 Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.
21 May 202608:12
cvelist
EUVD
EUVD-2026-31242
21 May 202608:12
euvd
Tenable Nessus
Mattermost Server 10.11.x < 10.11.15 / 11.4.x < 11.4.5 / 11.5.x < 11.5.4 / 11.6.x < 11.6.1 Path Traversal (MMSA-2026-00640)
28 May 202600:00
nessus
NVD
CVE-2026-4858
21 May 202609:16
nvd
Positive Technologies
PT-2026-42439
21 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-4858
5 Jun 202619:14
redhatcve
Snyk
Directory Traversal
21 May 202611:46
snyk
Rows per page
NVD
Node
mattermostmattermost_serverRange10.11.010.11.15
OR
mattermostmattermost_serverRange11.4.011.4.5
OR
mattermostmattermost_serverRange11.5.011.5.4
OR
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.6.0",
        "status": "affected",
        "version": "11.6.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.5.3",
        "status": "affected",
        "version": "11.5.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.4.4",
        "status": "affected",
        "version": "11.4.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.14",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "11.7.0",
        "status": "unaffected"
      },
      {
        "version": "11.6.1",
        "status": "unaffected"
      },
      {
        "version": "11.5.4",
        "status": "unaffected"
      },
      {
        "version": "11.4.5",
        "status": "unaffected"
      },
      {
        "version": "10.11.15",
        "status": "unaffected"
      }
    ]
  }
]

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21 May 2026 19:43Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18 - 9.9
EPSS0.00046
SSVC
14