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CVE-2026-46349

🗓️ 24 Jun 2026 19:40:35Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 5 Views

CVE-2026-46349 affects Mastodon before versions 4.5.10, 4.4.17, and 4.3.23. The issue arises from Mastodon’s normalization of incoming activities signed with Linked-Data Signatures, which does not sufficiently prevent a class of spoofing. An attac...

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-46349
24 Jun 202619:40
attackerkb
Cvelist
CVE-2026-46349 Mastodon: LD-Signature Bypass via JSON-LD Named-Graph Restructuring
24 Jun 202619:40
cvelist
EUVD
EUVD-2026-39054
24 Jun 202619:40
euvd
NVD
CVE-2026-46349
24 Jun 202620:16
nvd
Positive Technologies
PT-2026-52078
24 Jun 202600:00
ptsecurity
Vulners
Node
mastodonmastodonRange4.5.0-beta.14.5.10
[
  {
    "vendor": "mastodon",
    "product": "mastodon",
    "versions": [
      {
        "version": ">= 4.5.0-beta.1, < 4.5.10",
        "status": "affected"
      }
    ]
  }
]

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24 Jun 2026 20:16Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.15.3
EPSS0.0002
5