CVE-2023-49105
ownCloud Improper Authentication Vulnerability
An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Deadline for federal agencies: 2026-08-30.
3 articles across 3 outlets · first covered Aug 27, 2026 · latest Aug 28, 2026
Coverage timeline
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CISA Adds ownCloud Linux Kernel and Artifactory Flaws to KEV Listsecurityaffairs.com · Aug 28, 2026
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CISA Warns of Exploited Flaws in ownCloud, Linux Kernel, and JFrog Artifactorysecurityonline.info · Aug 28, 2026
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CISA Adds CVE-2023-49105 to Known Exploited Vulnerabilities Cataloguecisa.gov · Aug 27, 2026