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CVE-2026-67431: Improper Access Control

🗓️ 29 Jul 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 1 Views

Improper access control in MCP Ruby SDK prior to 0.23.0 allows session hijacking via ID.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-67431
29 Jul 202619:15
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circl
Circl
CVE-2026-67431
29 Jul 202621:21
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cve
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CVE-2026-67431
29 Jul 202619:15
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cvelist
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CVE-2026-67431 MCP Ruby SDK: Ruby SSE Session Poisoning
29 Jul 202619:15
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euvd
EUVD
EUVD-2026-50501
30 Jul 202614:44
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github
Github Security Blog
MCP Ruby SDK: Ruby SSE Session Poisoning
30 Jul 202614:44
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nvd
NVD
CVE-2026-67431
29 Jul 202620:17
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osv
OSV
GHSA-5P9G-J988-PCWV MCP Ruby SDK: Ruby SSE Session Poisoning
30 Jul 202614:44
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ptsecurity
Positive Technologies
PT-2026-65898
29 Jul 202600:00
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rubygems
RubySec
MCP Ruby SDK - Ruby SSE Session Poisoning
7 Jul 202600:00
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30 Jul 2026 00:00Current
6Medium risk
Vulners AI Score6
CVSS 48.3
EPSS0.0048
SSVC
1