CVE-2026-77165

Deferred Deferred - Pending Action

BaseFortify

Publication date: 2026-09-21

Last updated on: 2026-09-22

Assigner: HackerOne

Description

File owners were unable to unlock TYPE_TOKEN locks placed by other users, leaving files permanently locked with no recovery path outside of the database.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-21

Last Modified

2026-09-22

Generated

2026-10-12

AI Q&A

2026-09-21

EPSS Evaluated

2026-10-11

NVD

CVE-2026-77165

EUVD

EUVD-2026-83973

Affected Vendors & Products

Vendor	Product	Version / Range
Nextcloud	Server	32.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability involves a lock mechanism where file owners cannot remove TYPE_TOKEN locks created by other users. This results in files being permanently locked with no way to recover access outside of the database.

Impact Analysis

The impact includes potential permanent loss of access to critical files if they are locked by another user. This could disrupt operations, cause data unavailability, and require database intervention for recovery.

Compliance Impact

This vulnerability could impact compliance with standards like GDPR and HIPAA by potentially causing unauthorized data access or integrity issues due to permanently locked files. Unrecoverable file locks may lead to data availability problems, which could violate requirements for timely access or integrity of sensitive information.

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