CVE-2026-45156
8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Summary
Nextcloud is an open source content collaboration platform. From versions 0.3.0 to before 3.1.0, 5.0.0 to before 5.1.0, and 6.0.0 to before 6.4.0, a missing signature verification in User OIDC allowed a malicious ID4me authority to identify as any user. This issue has been patched in versions 3.1.0, 4.1.0, 5.1.0, 6.4.0 and 8.3.0.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nextcloud | security-advisories | >= 0.3.0, < 3.1.0 | affected |
| nextcloud | security-advisories | >= 5.0.0, < 5.1.0 | affected |
| nextcloud | security-advisories | >= 6.0.0, < 6.4.0 | affected |
Weaknesses
- CWE-287: CWE-287: Improper Authentication
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qqgv-fqwp-mjpp
- https://github.com/nextcloud/user_oidc/pull/1285
- https://hackerone.com/reports/3489490
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.