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EUVD-2026-4210

🗓️ 22 Jan 2026 01:55:29Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 17 Views

Mastodon vulnerability lets an authenticated user modify others' push subscriptions and leak endpoints; patched in versions 4.5.5, 4.4.12, and 4.3.18.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-23964
22 Jan 202601:55
–attackerkb
cnnvd
CNNVD
Mastodon security vulnerabilities
22 Jan 202600:00
–cnnvd
cve
CVE
CVE-2026-23964
22 Jan 202601:55
–cve
cvelist
Cvelist
CVE-2026-23964 Mastodon has insufficient access control to push notification settings
22 Jan 202601:55
–cvelist
mend
Mend
CVE-2026-23964
22 Jan 202601:55
–mend
nvd
NVD
CVE-2026-23964
22 Jan 202603:15
–nvd
osv
OSV
BIT-MASTODON-2026-23964 Mastodon has insufficient access control to push notification settings
31 Jan 202608:43
–osv
ptsecurity
Positive Technologies
PT-2026-3902
22 Jan 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-23964: Incorrect Authorization
22 Jan 202600:00
–rapid7
redhatcve
RedhatCVE
CVE-2026-23964
23 Jan 202606:19
–redhatcve
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "a00b4d37-dfb2-3945-90d2-907262bb6cf6",
        "vendor": {
          "name": "mastodon"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "4b66d6dc-88c5-37b4-b324-1f390cf86a88",
        "product": {
          "name": "mastodon"
        },
        "product_version": "4.4.0, < 4.4.12"
      },
      {
        "id": "8c1b1386-320a-33c7-bc4c-f2c6ac963152",
        "product": {
          "name": "mastodon"
        },
        "product_version": "< 4.3.18"
      },
      {
        "id": "fb4457aa-0633-362c-b0c2-14242549bf63",
        "product": {
          "name": "mastodon"
        },
        "product_version": "4.5.0, < 4.5.5"
      }
    ]
  }
]

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22 Jan 2026 17:02Current
5.6Medium risk
Vulners AI Score5.6
CVSS 3.16.5
EPSS0.00229
SSVC
17