CVE-2026-45267

Summary

Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.

Affected Software

Weaknesses

• CWE-200: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
• CWE-862: CWE-862: Missing Authorization

ADP Enrichment

CISA ADP Vulnrichment

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

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r4gh-f8x6-m55f
• https://github.com/nextcloud/forms/pull/3269
• https://hackerone.com/reports/3628817

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