Quick answers
- Is CVE-2023-49105 exploited in the wild?
- Yes. CVE-2023-49105 is known to be exploited in the wild, first recorded on 27 August 2026. Treat it as urgent.
- How severe is CVE-2023-49105?
- Critical severity, published 27 August 2026.
- Which products and versions are affected?
- ownCloud.
- Is there a fix for CVE-2023-49105?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2023-49105 attacked?
- It is attacked over the network.
- Am I affected by CVE-2023-49105?
- Check whether you run Owncloud. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
ownCloud contains an improper authentication flaw (CWE-287) in its file access control mechanism. The vulnerability allows unauthenticated attackers to interact with user files when the target user's username is known and no signing-key protection is enabled. The attack vector is network-based and does not require user interaction or existing authentication. An attacker can fully compromise file confidentiality and integrity by accessing, modifying, or deleting victim files. The vulnerability has been observed in active exploitation in the wild, indicating patch deployment should be prioritized immediately.
Affected products
- ownCloud
Timeline
- 2026-08-27: disclosed
- exploited: Exploited in the wild