CVE-2026-45543
Last modified
CVE-2026-45543 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
Description
Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Forms | >= 4.3.0, < 5.2.7 |
References
- https://github.com/nextcloud/forms/pull/3291Issue Tracking, Patch
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q4fw-6jf8-5vhhMitigation, Vendor Advisory
- https://hackerone.com/reports/3617352Permissions Required
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-45543?
How severe is CVE-2026-45543?
How do I fix CVE-2026-45543?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-45537OpenSIPS is a Session Initiation Protocol (SIP) server imple…9.1
- CVE-2026-45538OpenSIPS is a Session Initiation Protocol (SIP) server imple…9.8
- CVE-2026-45539Microsoft APM is an open-source, community-driven dependency…7.4
- CVE-2026-4554A security flaw has been discovered in Tenda F453 1.0.0.3. T…8.8
- CVE-2026-45541ESF-IDF is the Espressif Internet of Things (IOT) Developmen…7.5
- CVE-2026-45542ESF-IDF is the Espressif Internet of Things (IOT) Developmen…7.1
- CVE-2026-45544Nextcloud is an open source content collaboration platform. …4.3
- CVE-2026-45545Nextcloud is an open source content collaboration platform. …8.2
- CVE-2026-45548Budibase is an open-source low-code platform. Prior to 3.34.…7.7
- CVE-2026-45549Roxy-WI is a web interface for managing Haproxy, Nginx, Apac…8.5
- CVE-2026-4555A weakness has been identified in D-Link DIR-513 1.10. The i…8.8
- CVE-2026-45550Roxy-WI is a web interface for managing Haproxy, Nginx, Apac…9.1
Are you affected by CVE-2026-45543?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST