CVE-2026-45156EPSS p33.9%
CVE-2026-45156CVE-2026-45156
Description
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.
Scoring
| CVSS | 8.1 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
| EPSS | 0.41% probability of exploitation · percentile 33.9% · 2026-08-03T12:00:16Z |
| Last modified | 2026-07-22 |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.