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High severity8.1NVD Advisory· Published Jun 1, 2026· Updated Jun 1, 2026

CVE-2026-45156

CVE-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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

1
  • Nextcloud/User Oidcllm-fuzzy
    Range: 0.3.0 <= v < 3.1.0, 5.0.0 <= v < 5.1.0, 6.0.0 <= v < 6.4.0

Patches

Vulnerability mechanics

References

3

News mentions

1