CVE-2022-39346

Missing length validation of user displayname in nextcloud server

3.5 Low

Nextcloud server is an open source personal cloud server. Affected versions of nextcloud server did not properly limit user display names which could allow a malicious users to overload the backing database and cause a denial of service. It is recommended that the Nextcloud Server is upgraded to 22.2.10, 23.0.7 or 24.0.3. There are no known workarounds for this issue.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

1.10%Up 0.2 points since Nov 26, 2022

What each source reports

CVE List Score used 3.5

Missing length validation of user displayname in nextcloud server

Record: CVE-2022-39346
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-400, CWE-20
Updated: 2026-11-02

EUVDEUVD-2022-41818 3.5

Record: EUVD-2022-41818
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Updated: 2026-11-02

NVD 3.5

Record: CVE-2022-39346
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-20, CWE-400
Updated: 2026-11-02

OSV 3.5

Missing length validation of user displayname in nextcloud server

Record: CVE-2022-39346
CVSS 3.1: 3.5 LowCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-20, CWE-400
Updated: 2026-11-02

OSVopenSUSE-SU-2023:0083-1 No score

Security update for nextcloud

This update for nextcloud fixes the following issues:

Update to 23.0.12 See: https://nextcloud.com/changelog/#latest23
This also fix security issues:
- CVE-2022-35931: Password Policy app could generate passwords that would be block (boo#1203190)
- CVE-2022-39346: Missing length validation of user displayname allows to generate an SQL error (boo#1205802)
- CVE-2023-25579: Potential directory traversal in OC\Files\Node\Folder::getFullPath (boo#1208591)

Record: openSUSE-SU-2023:0083-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`nextcloud` SUSE:Package Hub 15 SP4 From an advisory covering 3 CVEs	before 23.0.12-bp154.2.3.1	23.0.12-bp154.2.3.1
`nextcloud` openSUSE:Leap 15.4 From an advisory covering 3 CVEs	before 23.0.12-bp154.2.3.1	23.0.12-bp154.2.3.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-39346 is a low vulnerability (CVSS 3.5) in Nextcloud Server, published November 25, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.10%, the 65th percentile. No source names a fixed version.

References

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