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CVE-2026-67431

🗓️ 29 Jul 2026 19:15:32Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 12 Views

Before 0.23.0, the Ruby Software Development Kit could misbind a session ID, enabling session theft; fixed in 0.23.0.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-67431
29 Jul 202619:15
attackerkb
circl
Circl
CVE-2026-67431
29 Jul 202621:21
circl
cvelist
Cvelist
CVE-2026-67431 MCP Ruby SDK: Ruby SSE Session Poisoning
29 Jul 202619:15
cvelist
euvd
EUVD
EUVD-2026-50501
29 Jul 202619:15
euvd
nvd
NVD
CVE-2026-67431
29 Jul 202620:17
nvd
osv
OSV
CVE-2026-67431 MCP Ruby SDK: Ruby SSE Session Poisoning
29 Jul 202619:15
osv
ptsecurity
Positive Technologies
PT-2026-65898
29 Jul 202600:00
ptsecurity
Vulners
[
  {
    "vendor": "modelcontextprotocol",
    "product": "ruby-sdk",
    "versions": [
      {
        "version": "< 0.23.0",
        "status": "affected"
      }
    ]
  }
]

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29 Jul 2026 20:17Current
6Medium risk
Vulners AI Score6
CVSS 48.3
12