CVE-2026-116685
CVE-2026-116685 · Model Context Protocol Python SDK: HTTP client transports followed cross-origin redirects carrying custom headers and bodies
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The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.8.0 until 1.30.0 and 2.2.0, streamable_http_client, streamablehttp_client, sse_client, ClientSessionGroup, OAuth, and create_mcp_http_client client paths enable follow_redirects and follow redirects to a different origin, forwarding caller-supplied custom credential headers and, for 307 or 308 responses, the request body. An attacker who can influence a trusted endpoint's redirect destination can receive that material. This issue is fixed in versions 1.30.0 and 2.2.0.
CVSS 5.9 · Mittel · EPSS 0,4% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: python
Betroffene Produkte und Versionen
python-sdk
- Softwareversionen
- >= 1.8.0, < 1.30.0: Betroffen
- >= 2.0.0, < 2.2.0: Betroffen
Keine Korrektur veröffentlicht
mcp PyPI
- Softwareversionen
- 2.0.0
- 2.0.1
- 2.1.0
- 2.1.1
- Betroffene Versionsbereiche
- ECOSYSTEM: ≥ 2.0.0, < 2.2.0
Auf 2.2.0 aktualisieren
mcp PyPI
- Softwareversionen
- 1.10.0
- 1.10.1
- 1.11.0
- 1.12.0
- 1.12.1
- 1.12.2
- 1.12.3
- 1.12.4
- 1.13.0
- 1.13.1
- 1.14.0
- 1.14.1
- 1.15.0
- 1.16.0
- 1.17.0
- 1.18.0
- 1.19.0
- 1.20.0
- 1.21.0
- 1.21.1
- 1.21.2
- 1.22.0
- 1.23.0
- 1.23.1
- 1.23.2
- 1.23.3
- 1.24.0
- 1.25.0
- 1.26.0
- 1.27.0
- 1.27.1
- 1.27.2
- 1.28.0
- 1.28.1
- 1.29.0
- 1.29.1
- 1.8.0
- 1.8.1
- 1.9.0
- 1.9.1
- 1.9.2
- 1.9.3
- 1.9.4
- Betroffene Versionsbereiche
- ECOSYSTEM: ≥ 1.8.0, < 1.30.0
Auf 1.30.0 aktualisieren
Originalquellen
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-5h93-6whr-6q8j
- https://github.com/modelcontextprotocol/python-sdk/pull/3397
- https://github.com/modelcontextprotocol/python-sdk/pull/3448
- https://github.com/modelcontextprotocol/python-sdk/commit/2106335745563b2321b8c73fef2c12903d00aa6e
- https://github.com/modelcontextprotocol/python-sdk/commit/c6762e821c527925f0b617db216d00fbd1d0bf99
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.30.0
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v2.2.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-116685