CVE-2026-45153: CWE-287: Improper Authentication in nextcloud security-advisories
Nextcloud Files app versions from 33.0.0 up to but not including 33.1.0 for Android allowed bypassing the app PIN by using the back-button after unlocking a locked phone. This improper authentication vulnerability has been fixed in version 33.1.0. The issue has a medium severity with a CVSS score of 4.6.
AI Analysis
Technical Summary
CVE-2026-45153 is an improper authentication vulnerability (CWE-287) in the Nextcloud Files Android app versions >=33.0.0 and <33.1.0. After unlocking a locked Android phone, an attacker could bypass the app's PIN protection by pressing the back-button, potentially gaining unauthorized access to the app's content. This vulnerability was patched in Nextcloud Files app version 33.1.0.
Potential Impact
The vulnerability allows an attacker with physical access to an unlocked Android device to bypass the Nextcloud Files app PIN, potentially exposing sensitive content stored or accessible via the app. The CVSS score of 4.6 reflects a medium severity impact with high confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade the Nextcloud Files Android app to version 33.1.0 or later, where this PIN bypass vulnerability has been patched. No other mitigation is indicated or required.
CVE-2026-45153: CWE-287: Improper Authentication in nextcloud security-advisories
Description
Nextcloud Files app versions from 33.0.0 up to but not including 33.1.0 for Android allowed bypassing the app PIN by using the back-button after unlocking a locked phone. This improper authentication vulnerability has been fixed in version 33.1.0. The issue has a medium severity with a CVSS score of 4.6.
CVSS v3.1
Score 4.6medium
Affected software
pkg:github/nextcloud/androidRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-45153 is an improper authentication vulnerability (CWE-287) in the Nextcloud Files Android app versions >=33.0.0 and <33.1.0. After unlocking a locked Android phone, an attacker could bypass the app's PIN protection by pressing the back-button, potentially gaining unauthorized access to the app's content. This vulnerability was patched in Nextcloud Files app version 33.1.0.
Potential Impact
The vulnerability allows an attacker with physical access to an unlocked Android device to bypass the Nextcloud Files app PIN, potentially exposing sensitive content stored or accessible via the app. The CVSS score of 4.6 reflects a medium severity impact with high confidentiality impact, low integrity impact, and no availability impact. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade the Nextcloud Files Android app to version 33.1.0 or later, where this PIN bypass vulnerability has been patched. No other mitigation is indicated or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-08T20:44:38.964Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1dbba3e29bf47b501c57ab
Added to database: 06/01/2026, 17:04:35 UTC
Last enriched: 07/13/2026, 09:54:34 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 39
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