Medium severity · published Sep 21, 2026
CVE-2026-77165
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
6.5
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Server · Nextcloud
32.0.0 through 34.0.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77165
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77165
hackerone.com
https://hackerone.com/reports/3770482
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