# Nextcloud Server vulnerabilities Source: https://junglewise.ai/threats/technologies/nextcloud-server Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/nextcloud-server.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 14 vulnerabilities in Nextcloud Server: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-77167, was published on 27 October 2026. 1 vulnerability in the last four weeks, up from none in the four before. ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 1 - All time: 14 (0 critical, 0 exploited in the wild) ## About Nextcloud Server Nextcloud Server is an open-source content collaboration platform that allows users to store, share, and sync files and data. ## Latest Nextcloud Server vulnerabilities - [CVE-2026-77167: Nextcloud federated share endpoint unauthenticated database write](https://junglewise.ai/threats/cve-2026-77167-abusing-the-federated-share-endpoint-an-attacker-can-write) (high, CVSS 7.5, published 27 Oct 2026) - [CVE-2026-45810: Nextcloud Server authorization bypass in file comments](https://junglewise.ai/threats/cve-2026-45810-nextcloud-server-authorization-bypass-in-file-comments) (medium, CVSS 6.8, published 1 Jun 2026) - [CVE-2026-45691: Nextcloud Server 2FA bypass in DAV endpoints via session cookie reuse](https://junglewise.ai/threats/cve-2026-45691-nextcloud-server-2fa-bypass-in-dav-endpoints-via-session-cookie) (medium, CVSS 5.9, published 1 Jun 2026) - [CVE-2026-45690: Nextcloud Server 2FA bypass via session token replay](https://junglewise.ai/threats/cve-2026-45690-nextcloud-server-2fa-bypass-via-session-token-replay) (medium, CVSS 5.9, published 1 Jun 2026) - [CVE-2026-45285: Nextcloud Server hidden public link creation in Teams sharing](https://junglewise.ai/threats/cve-2026-45285-nextcloud-server-hidden-public-link-creation-in-teams-sharing) (medium, CVSS 6.4, published 1 Jun 2026) - [CVE-2026-45283: Nextcloud Server improper authentication in files_lock app](https://junglewise.ai/threats/cve-2026-45283-nextcloud-server-improper-authentication-in-files-lock-app) (medium, CVSS 6.3, published 1 Jun 2026) - [CVE-2026-45282: Nextcloud Server access control bypass in Text attachments](https://junglewise.ai/threats/cve-2026-45282-nextcloud-server-access-control-bypass-in-text-attachments) (medium, CVSS 6.5, published 1 Jun 2026) - [CVE-2026-45281: Nextcloud Server authorization bypass in calendar delegation](https://junglewise.ai/threats/cve-2026-45281-nextcloud-server-authorization-bypass-in-calendar-delegation) (high, CVSS 8.1, published 1 Jun 2026) - [CVE-2025-64011: Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint. Any…](https://junglewise.ai/threats/cve-2025-64011-nextcloud-server-30-0-0-is-vulnerable-to-an-insecure-direct) (medium, CVSS 4.3, published 12 Dec 2025) - [CVE-2025-66552: Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 30.0.9 and…](https://junglewise.ai/threats/cve-2025-66552-nextcloud-server-is-a-self-hosted-personal-cloud-system-in) (medium, CVSS 4.3, published 5 Dec 2025) - [CVE-2025-66547: Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 31.0.1…](https://junglewise.ai/threats/cve-2025-66547-nextcloud-server-is-a-self-hosted-personal-cloud-system-in) (medium, CVSS 4.3, published 5 Dec 2025) - [CVE-2025-66512: Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Server Enterprise prior to 31.0.12…](https://junglewise.ai/threats/cve-2025-66512-nextcloud-server-is-a-self-hosted-personal-cloud-system-in) (medium, CVSS 5.4, published 5 Dec 2025) - [CVE-2025-66510: Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server prior to 31.0.10 and 32.0.1 and Nextcloud…](https://junglewise.ai/threats/cve-2025-66510-nextcloud-server-is-a-self-hosted-personal-cloud-system-in) (medium, CVSS 4.5, published 5 Dec 2025) - [CVE-2025-59788: Cross-site scripting (XSS) vulnerability in a reachable files_pdfviewer example directory in Nextcloud with versions…](https://junglewise.ai/threats/cve-2025-59788-cross-site-scripting-xss-vulnerability-in-a-reachable-files) (medium, CVSS 6.4, published 4 Dec 2025) ## Most severe Nextcloud Server vulnerabilities - [CVE-2026-45281: Nextcloud Server authorization bypass in calendar delegation](https://junglewise.ai/threats/cve-2026-45281-nextcloud-server-authorization-bypass-in-calendar-delegation) (high, CVSS 8.1, published 1 Jun 2026) - [CVE-2026-77167: Nextcloud federated share endpoint unauthenticated database write](https://junglewise.ai/threats/cve-2026-77167-abusing-the-federated-share-endpoint-an-attacker-can-write) (high, CVSS 7.5, published 27 Oct 2026) - [CVE-2026-45810: Nextcloud Server authorization bypass in file comments](https://junglewise.ai/threats/cve-2026-45810-nextcloud-server-authorization-bypass-in-file-comments) (medium, CVSS 6.8, published 1 Jun 2026) - [CVE-2026-45282: Nextcloud Server access control bypass in Text attachments](https://junglewise.ai/threats/cve-2026-45282-nextcloud-server-access-control-bypass-in-text-attachments) (medium, CVSS 6.5, published 1 Jun 2026) - [CVE-2025-59788: Cross-site scripting (XSS) vulnerability in a reachable files_pdfviewer example directory in Nextcloud with versions…](https://junglewise.ai/threats/cve-2025-59788-cross-site-scripting-xss-vulnerability-in-a-reachable-files) (medium, CVSS 6.4, published 4 Dec 2025) - [CVE-2026-45285: Nextcloud Server hidden public link creation in Teams sharing](https://junglewise.ai/threats/cve-2026-45285-nextcloud-server-hidden-public-link-creation-in-teams-sharing) (medium, CVSS 6.4, published 1 Jun 2026) - [CVE-2026-45283: Nextcloud Server improper authentication in files_lock app](https://junglewise.ai/threats/cve-2026-45283-nextcloud-server-improper-authentication-in-files-lock-app) (medium, CVSS 6.3, published 1 Jun 2026) - [CVE-2026-45691: Nextcloud Server 2FA bypass in DAV endpoints via session cookie reuse](https://junglewise.ai/threats/cve-2026-45691-nextcloud-server-2fa-bypass-in-dav-endpoints-via-session-cookie) (medium, CVSS 5.9, published 1 Jun 2026) - [CVE-2026-45690: Nextcloud Server 2FA bypass via session token replay](https://junglewise.ai/threats/cve-2026-45690-nextcloud-server-2fa-bypass-via-session-token-replay) (medium, CVSS 5.9, published 1 Jun 2026) - [CVE-2025-66512: Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Server Enterprise prior to 31.0.12…](https://junglewise.ai/threats/cve-2025-66512-nextcloud-server-is-a-self-hosted-personal-cloud-system-in) (medium, CVSS 5.4, published 5 Dec 2025) ## Vulnerabilities per week 1 vulnerability in the last four weeks, up from none in the four before. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 0 | 0 | 0 | | 7 Sep 2026 | 0 | 0 | 0 | | 14 Sep 2026 | 0 | 0 | 0 | | 21 Sep 2026 | 0 | 0 | 0 | | 28 Sep 2026 | 0 | 0 | 0 | | 5 Oct 2026 | 0 | 0 | 0 | | 12 Oct 2026 | 0 | 0 | 0 | | 19 Oct 2026 | 0 | 0 | 0 | | 26 Oct 2026 | 1 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other Nextcloud technologies - [Nextcloud Enterprise Server](https://junglewise.ai/threats/technologies/nextcloud-enterprise-server): 7 vulnerabilities - [Nextcloud Tables](https://junglewise.ai/threats/technologies/tables): 5 vulnerabilities - [Nextcloud Approval](https://junglewise.ai/threats/technologies/approval): 4 vulnerabilities - [Nextcloud Calendar](https://junglewise.ai/threats/technologies/calendar): 4 vulnerabilities - [Nextcloud Forms](https://junglewise.ai/threats/technologies/forms): 4 vulnerabilities - [Nextcloud User OIDC](https://junglewise.ai/threats/technologies/user-oidc): 3 vulnerabilities ## Sources NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Nextcloud Server vulnerabilities", https://junglewise.ai/threats/technologies/nextcloud-server, 9 November 2026.