CVE-2026-45544: Nextcloud: Information Disclosure of view filter metdata via Broken Sensitive Data Masking in ViewService

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% 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-1230

Description

Nextcloud is an open source content collaboration platform. From version 0.8.0 to before version 1.0.4, the view filter criteria is exposed to users with read-only permissions in Nextcloud Tables. This issue has been patched in versions 1.0.4 and 2.0.0.

Affected products

nextcloud Tables: from 0.8.0 before 1.0.4 — fixed in 1.0.4

How to fix

Upgrade to a fixed version: nextcloud Tables 1.0.4. Check the vendor advisory for mitigations.

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vvxm-6jjp-m9mp
https://github.com/nextcloud/tables/pull/2312
https://hackerone.com/reports/3483753

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