mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll before validation, to degrade or OOM-kill the server process.
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Affected Vendors & Products
Advisories
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Fixes
Solution
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Workaround
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References
History
Sun, 11 Oct 2026 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | mcp-go through 1.2.1 contains a denial of service vulnerability in StreamableHTTPServer.ServeHTTP that allows remote unauthenticated attackers to exhaust memory by sending oversized POST bodies. Attackers can send arbitrarily large or many concurrent POST requests, read fully via io.ReadAll before validation, to degrade or OOM-kill the server process. | |
| Title | mcp-go through 1.2.1 Denial of Service via Unbounded POST Body Buffering | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-11T13:26:06.450Z
Reserved: 2026-10-11T13:06:49.278Z
Link: CVE-2026-108859
No data.
Status : Deferred
Published: 2026-10-11T14:17:05.780
Modified: 2026-10-11T14:17:05.893
Link: CVE-2026-108859
No data.
OpenCVE Enrichment
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Weaknesses