CVE-2026-45277: Nextcloud: Information disclosure in Nextcloud Approval app via fileId parameter reveals workflow associations

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-01 · updated 2026-07-22
Weakness: CWE-200

Description

Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, authenticated users can check if arbitrary files are associated with specific approval workflows where they can request approval. This issue has been patched in version 2.7.2.

Affected products

Nextcloud Approval: before 2.7.2 — fixed in 2.7.2

How to fix

Upgrade to a fixed version: Nextcloud Approval 2.7.2. Check the vendor advisory for mitigations.

References

https://github.com/nextcloud/approval/pull/356
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-h7gm-vgxr-9hcw
https://hackerone.com/reports/3475210

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