Authentication Bypass in Web Application by Vendor X's Product
CVE-2026-77172

5.3MEDIUM

Key Information:

Vendor

Nextcloud
Status
Server
Vendor
CVE Published:
27 October 2026

What is CVE-2026-77172?

A significant vulnerability exists in Vendor X's Web Application, allowing unauthorized app passwords to bypass the necessary password confirmation process on sensitive endpoints. This flaw could potentially lead to unauthorized access, putting sensitive data at risk. It is crucial for users to apply security updates and enforce strong authentication measures to mitigate this risk.

Affected Version(s)

Server 32.0.0 <= 34.0.0

References

https://hackerone.com/reports/3566607

CVSS V3.0

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nicholas Carlini (npc)
.