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MCP Java SDK has a Hardcoded Wildcard CORS (Access-Control-Allow-Origin: *)

🗓️ 30 Mar 2026 17:26:44Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 7 Views

MCP Java SDK enables wildcard CORS for SSE, enabling cross-origin reads; use server-side CORS.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-34237
31 Mar 202615:40
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13 Apr 202619:18
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31 Mar 202615:40
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Cvelist
CVE-2026-34237 MCP Java SDK has a Hardcoded Wildcard CORS (Access-Control-Allow-Origin: *)
31 Mar 202615:40
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CVE-2026-34237
31 Mar 202616:16
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Oracle
Oracle Critical Patch Update Advisory - April 2026
24 Apr 202600:00
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Tenable Nessus
Oracle Database Server (April 2026 CPU)
24 Apr 202600:00
nessus
OSV
CGA-RPQR-576X-6RXX
13 Apr 202619:16
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OSV
CVE-2026-34237 MCP Java SDK has a Hardcoded Wildcard CORS (Access-Control-Allow-Origin: *)
31 Mar 202615:40
osv
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09 Jun 2026 18:39Current
7.5High risk
Vulners AI Score7.5
CVSS 3.16.1
EPSS0.00222
SSVC
7