CVE-2026-45275 json
Nextcloud: Authorization bypass in approval feature allows unauthorized file sharing with approvers
published 2026-06-01 5 mo ago modified 2026-07-22 3 mo ago also EUVD-2026-33702
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected products
- nextcloud security-advisories
Classification
- Weakness
-
- CWE-285 Improper Authorization
References
-
github.com
/nextcloud/approval/pull/392
issue-tracking, patch
-
github.com
/nextcloud/security-advisories/security/advisories/GHSA-v8q8-w6c3-3gv9
mitigation, vendor-advisory
-
hackerone.com
/reports/3593780
permissions-required
Sources
- CVE List CVE-2026-45275
- NVD CVE-2026-45275
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.