What’s Vulnerable › Vulnerabilities

CVE-2026-45153: Nextcloud: PIN bypass in PassCodeActivity via back button

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-01 · updated 2026-07-22
• Weakness: CWE-287

Description

Nextcloud is an open source content collaboration platform. From version 33.0.0 to before version 33.1.0, after unlocking a locked Android phone the back-button could be used to bypass the Nextcloud Files app PIN. This issue has been patched in version 33.1.0.

Affected products

• nextcloud security-advisories: from 33.0.0, < 33.1.0

References

• https://github.com/nextcloud/android/pull/16896
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2w7v-5299-3hw5
• https://hackerone.com/reports/3625210

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