CVE-2026-45284
Last modified
CVE-2026-45284 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
Description
Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched in version 8.4.0.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | User Oidc | >= 1.3.6, < 8.4.0 |
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-79xf-ffj8-96fmMitigation, Vendor Advisory
- https://github.com/nextcloud/user_oidc/pull/1340Issue Tracking, Patch
- https://hackerone.com/reports/3554696Permissions Required
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-45284?
How severe is CVE-2026-45284?
How do I fix CVE-2026-45284?
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-45278Nextcloud is an open source content collaboration platform. …6.1
- CVE-2026-45279Nextcloud is an open source content collaboration platform. …6.5
- CVE-2026-4528A vulnerability was determined in trueleaf ApiFlow 0.9.7. Th…7.3
- CVE-2026-45281Nextcloud is an open source content collaboration platform. …8.1
- CVE-2026-45282Nextcloud is an open source content collaboration platform. …6.5
- CVE-2026-45283Nextcloud is an open source content collaboration platform. …4.3
- CVE-2026-45285Nextcloud is an open source content collaboration platform. …6.4
- CVE-2026-45286Nextcloud is an open source content collaboration platform. …4.3
- CVE-2026-45287OpenTelemetry-Go is the Go implementation of OpenTelemetry. …5.5
- CVE-2026-45288Marten is a .NET Transactional Document DB and Event Store o…9.8
- CVE-2026-45289CloudburstMC Protocol is a protocol library for Minecraft Be…5.3
- CVE-2026-4529A vulnerability was identified in D-Link DHP-1320 1.00WWB04.…8.8
Are you affected by CVE-2026-45284?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST