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CVE-2026-63119 MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)

🗓️ 29 Jul 2026 19:12:07Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 71 Views

DoS in model context protocol ruby SDK from unbounded line buffer in stdio transports; fixed in 0.23.0.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-63119
29 Jul 202619:12
–attackerkb
circl
Circl
CVE-2026-63119
29 Jul 202621:26
–circl
cve
CVE
CVE-2026-63119
29 Jul 202619:12
–cve
euvd
EUVD
EUVD-2026-50500
30 Jul 202614:41
–euvd
github
Github Security Blog
MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)
30 Jul 202614:41
–github
mend
Mend
CVE-2026-63119
29 Jul 202619:12
–mend
nvd
NVD
CVE-2026-63119
29 Jul 202620:17
–nvd
osv_ghsa
osv_ghsa
GHSA-7683-3W9X-CH42 MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)
30 Jul 202614:41
–osv_ghsa
ptsecurity
Positive Technologies
PT-2026-65889
29 Jul 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-63119: Uncontrolled Resource Consumption
29 Jul 202600:00
–rapid7
Rows per page
[
  {
    "vendor": "modelcontextprotocol",
    "product": "ruby-sdk",
    "versions": [
      {
        "version": "< 0.23.0",
        "status": "affected"
      }
    ]
  }
]

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