Threats Tagged 'cve-2026-55640'
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Threats Tagged 'cve-2026-55640'
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0 Nextcloud MCP Server versions prior to 0.117.2 have a missing authentication vulnerability on the POST /webhooks/nextcloud endpoint. The default configuration allows unauthenticated requests because the WEBHOOK_SECRET is unset by default and not validated at startup. This enables an attacker to send forged webhook payloads that specify arbitrary user IDs, leading to unauthorized deletion or re-indexing of vector embeddings and destruction of the semantic search index. The issue is fixed in version 0.117.2. Join the discussion | CVE Database V5 | 08/25/2026, 16:03:28 UTC Added: 08/25/2026, 16:08:01 UTC |
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