# Nextcloud User OIDC vulnerabilities

Source: https://junglewise.ai/threats/technologies/user-oidc  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/user-oidc.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Nextcloud User OIDC: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-45284, was published on 1 June 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (0 critical, 0 exploited in the wild)

## About Nextcloud User OIDC

An application for Nextcloud that allows users to authenticate via an OpenID Connect provider.

## Latest Nextcloud User OIDC vulnerabilities

- [CVE-2026-45284: Nextcloud User OIDC improper access control for deleted LDAP users](https://junglewise.ai/threats/cve-2026-45284-nextcloud-user-oidc-improper-access-control-for-deleted-ldap) (medium, CVSS 4.6, published 1 Jun 2026)
- [CVE-2026-45278: Nextcloud User OIDC open redirect in login flow](https://junglewise.ai/threats/cve-2026-45278-nextcloud-user-oidc-open-redirect-in-login-flow) (low, CVSS 3.3, published 1 Jun 2026)
- [CVE-2026-45156: Nextcloud User OIDC authentication bypass via missing signature verification](https://junglewise.ai/threats/cve-2026-45156-nextcloud-user-oidc-authentication-bypass-via-missing-signature) (high, CVSS 8.1, published 1 Jun 2026)

## Most severe Nextcloud User OIDC vulnerabilities

- [CVE-2026-45156: Nextcloud User OIDC authentication bypass via missing signature verification](https://junglewise.ai/threats/cve-2026-45156-nextcloud-user-oidc-authentication-bypass-via-missing-signature) (high, CVSS 8.1, published 1 Jun 2026)
- [CVE-2026-45284: Nextcloud User OIDC improper access control for deleted LDAP users](https://junglewise.ai/threats/cve-2026-45284-nextcloud-user-oidc-improper-access-control-for-deleted-ldap) (medium, CVSS 4.6, published 1 Jun 2026)
- [CVE-2026-45278: Nextcloud User OIDC open redirect in login flow](https://junglewise.ai/threats/cve-2026-45278-nextcloud-user-oidc-open-redirect-in-login-flow) (low, CVSS 3.3, published 1 Jun 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Nextcloud technologies

- [Nextcloud Server](https://junglewise.ai/threats/technologies/nextcloud-server): 14 vulnerabilities
- [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

## 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 User OIDC vulnerabilities", https://junglewise.ai/threats/technologies/user-oidc, 9 November 2026.