CVE-2026-45264

Summary

Nextcloud is an open source content collaboration platform. From versions 17.0.0 to before 17.0.15, 18.0.0 to before 18.1.12, 19.0.0 to before 19.1.16, 20.0.0 to before 20.1.11, and 21.0.0 to before 21.0.4, a user with READ and CREATE permission, but no UPDATE permission for a team folder can rename files in the team folder. This issue has been patched in versions 17.0.15, 18.1.12, 19.1.16, 20.1.11, and 21.0.4.

Affected Software

VendorProductVersion RangeStatus
nextcloudsecurity-advisories>= 17.0.0, < 17.0.15affected
nextcloudsecurity-advisories>= 18.0.0, < 18.1.12affected
nextcloudsecurity-advisories>= 19.0.0, < 19.1.16affected
nextcloudsecurity-advisories>= 20.0.0, < 20.1.11affected
nextcloudsecurity-advisories>= 21.0.0, < 21.0.4affected

Weaknesses

  • CWE-284: CWE-284: Improper Access Control

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References