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CVE-2026-34742 Model Context Protocol Go SDK: DNS Rebinding Protection Disabled by Default for Servers Running on Localhost

🗓️ 02 Apr 2026 18:32:34Reported by GoogleType 
osv
 osv🔗 osv.dev👁 2 Views

Go Model Context Protocol before 1.4.0 disables DNS rebinding protection on localhost HTTP servers; patch released in 1.4.0.

Related
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-34742
2 Apr 202618:32
–attackerkb
Circl		CVE-2026-34742
2 Apr 202622:22
–circl
CNNVD		MCP Go SDK 安全漏洞
2 Apr 202600:00
–cnnvd
CVE		CVE-2026-34742
2 Apr 202618:32
–cve
Cvelist		CVE-2026-34742 Model Context Protocol Go SDK: DNS Rebinding Protection Disabled by Default for Servers Running on Localhost
2 Apr 202618:32
–cvelist
Fedora		[SECURITY] Fedora 44 Update: glab-1.91.0-1.fc44
25 Apr 202601:54
–fedora
Tenable Nessus		Fedora 44 : glab (2026-8b0a672383)
28 Apr 202600:00
–nessus
Github Security Blog		DNS Rebinding Protection Disabled by Default in Model Context Protocol Go SDK for Servers Running on Localhost
1 Apr 202621:09
–github
NVD		CVE-2026-34742
2 Apr 202619:21
–nvd
OSV		CLEANSTART-2026-LO26058 Security fixes for CVE-2025-15558, CVE-2026-1229, CVE-2026-25934, CVE-2026-27896, CVE-2026-33252, CVE-2026-33762, CVE-2026-34165, CVE-2026-34742, ghsa-37cx-329c-33x3, ghsa-89xv-2j6f-qhc8, ghsa-f6x5-jh6r-wrfv, ghsa-gm2x-2g9h-ccm8, ghsa-j5w8-q4qc-rx2x, ghsa-jhf3-xxhw-2wpp, ghsa-p436-gjf2-799p, ghsa-q382-vc8q-7jhj, ghsa-q9hv-hpm4-hj6x, ghsa-wvj2-96wp-fq3f, ghsa-xw59-hvm2-8pj6 applied in versions: 0.9.7-r1, 0.9.8-r0
18 May 202614:00
–osv
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08 Jul 2026 08:12Current
5.9Medium risk
Vulners AI Score5.9
CVSS 47.6
EPSS0.00455
Model Context Protocoldomain name systemrebindinglocalhost usagesecurity patchversion difference
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