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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-8vh3-g2qg-2h2c | nextcloud-mcp-server: Unauthenticated `POST /webhooks/nextcloud` allows arbitrary vector data deletion when `WEBHOOK_SECRET` is unset ( default ) |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Tue, 25 Aug 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 25 Aug 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Nextcloud MCP Server is a production-ready MCP server that connects AI assistants to a Nextcloud instance. Prior to 0.117.2, the POST /webhooks/nextcloud endpoint in nextcloud_mcp_server/vector/webhook_receiver.py has no authentication by default because WEBHOOK_SECRET defaults to None and startup validation does not require it. When WEBHOOK_SECRET is unset, handle_nextcloud_webhook() accepts unauthenticated requests. The payload["user"]["uid"] field parsed in nextcloud_mcp_server/vector/webhook_parser.py is attacker-controlled and is used without an authenticated-session cross-check for Qdrant operations, allowing a network attacker to delete or trigger re-indexing of vector embeddings for any user and to destroy the semantic search index by sending forged deletion events. This issue is fixed in version 0.117.2. | |
| Title | Nextcloud MCP Server: Unauthenticated `POST /webhooks/nextcloud` allows arbitrary vector data deletion when `WEBHOOK_SECRET` is unset ( default ) | |
| Weaknesses | CWE-306 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-25T19:20:43.689Z
Reserved: 2026-06-16T23:52:12.057Z
Link: CVE-2026-55640
Updated: 2026-08-25T18:38:43.180Z
Status : Received
Published: 2026-08-25T16:16:55.810
Modified: 2026-08-25T20:16:57.797
Link: CVE-2026-55640
No data.
OpenCVE Enrichment
Updated: 2026-08-25T21:30:06Z
Github GHSA