Hub/AI Security/Advisories/GHSA-w83x-jw8h-w4rj
Server/client session dispatch returns raw handler exception messages (and the full cause chain) to the peer → information disclosure
MCP Java SDK security advisory.
| GHSA | GHSA-w83x-jw8h-w4rj |
|---|---|
| Published | Oct 20, 2026 |
| Severity | Medium 5.3 |
| CVE | None assigned |
| Status | patched |
| Affected | >= 0.11.0, 0 < 0.18.5, >= 1.0.0, < 1.1.5, >= 2.0.0, < 2.1.0 |
| Fixed in | 0.18.5, 1.1.5, 2.1.0 |
| Component | MCP Java SDK |
Sources
Checked 2026-11-04. We copy severity and fix versions from the source and never estimate them.
Affected tools
Weekly, free
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