Medium severity · published Sep 18, 2026
CVE-2026-77170
The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage…
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage the referenced board.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DE
Deck · Nextcloud
1.16.0 through 1.18.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77170
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77170
hackerone.com
https://hackerone.com/reports/3599383
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