CVE-2026-45159
3.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Summary
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nextcloud | security-advisories | >= 1.15.0, < 1.15.4 | affected |
| nextcloud | security-advisories | >= 1.16.0, < 1.16.3 | affected |
| nextcloud | security-advisories | >= 1.17.0, < 1.17.1 | affected |
| nextcloud | security-advisories | >= 1.18.0, < 1.18.1 | affected |
Weaknesses
- CWE-639: CWE-639: Authorization Bypass Through User-Controlled Key
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-p3qw-7gwx-wg24
- https://github.com/nextcloud/end_to_end_encryption/pull/1395
- https://hackerone.com/reports/3304830
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