high8.1
CVE-2026-45156
Nextcloud is an open source content collaboration platform.
Impact
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 products
| Product | Affected versions |
|---|---|
| 5.0.0 To | before 5.1.0 |
| And 6.0.0 To | before 6.4.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.