# MCP TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validation

Advisory record · `GHSA-46jr-4wx8-v453`

- **Identifiers:** `GHSA-46jr-4wx8-v453` · `CVE-2026-111768`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 20 Oct 2026
- **Updated:** 20 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 20 Oct 2026, 20:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@modelcontextprotocol/sdk` (npm): affected `>=1.3.0, <1.32.0`; fixed in `1.32.0`
- `@modelcontextprotocol/server` (npm): affected `>=2.0.0, <2.3.0`; fixed in `2.3.0`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0060, the 48th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:33 UTC: First seen by agentprime
- 31 Oct 2026, 13:33 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-46jr-4wx8-v453)
- 5 Nov 2026, 21:22 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-111768)
- 5 Nov 2026, 22:17 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-111768)

## Sources

- [GitHub Advisory Database: GHSA-46jr-4wx8-v453](https://github.com/advisories/GHSA-46jr-4wx8-v453)
- [OSV: GHSA-46jr-4wx8-v453](https://osv.dev/vulnerability/GHSA-46jr-4wx8-v453)
- <https://github.com/modelcontextprotocol/typescript-sdk/security/advisories/GHSA-46jr-4wx8-v453>
- <https://github.com/modelcontextprotocol/typescript-sdk/pull/2926>
- <https://github.com/modelcontextprotocol/typescript-sdk/pull/2927>
- <https://github.com/modelcontextprotocol/typescript-sdk/commit/6d8dbc6cb590edf766fcb66b636ca6b654e99c37>
- <https://github.com/modelcontextprotocol/typescript-sdk/commit/fd26801b3b387742fe24a90ed4b275dd6072209f>
- <https://github.com/modelcontextprotocol/typescript-sdk>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-46jr-4wx8-v453>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-46jr-4wx8-v453/>. Everything for agents: <https://agentprime.io/llms.txt>.