CVE-2022-39346Network attack vector

Database service interruption via oversized display names

Published Nov 25, 2022 · Updated Apr 23, 2025

Resource exhaustion in affected Nextcloud Server releases allows remote authenticated users to interrupt the backing database. The provisioning API display-name update path passes strings longer than 64 characters to the database instead of rejecting them, provoking SQL errors during persistence. A logged-in account able to edit a display name is required; repeated oversized updates can disrupt database-backed service without reported data disclosure or modification.

CVSS severity3.5
Low
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in affected Nextcloud Server releases allows remote authenticated users to interrupt the backing database. The provisioning API display-name update path passes strings longer than 64 characters to the database instead of rejecting them, provoking SQL errors during persistence. A logged-in account able to edit a display name is required; repeated oversized updates can disrupt database-backed service without reported data disclosure or modification.

The record

CVE
CVE-2022-39346
Published
Nov 25, 2022
Updated
Apr 23, 2025
Vendor
Nextcloud GmbH
Product
Security Advisories
Classifications
CWE-400, CWE-20, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 22.2.10
  2. Affected versionversion=>= 23.0.0, < 23.0.7
  3. Affected versionversion=>= 24.0.0, < 24.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nextcloud GmbH · Security Advisoriesversion=< 22.2.10; version=>= 23.0.0, < 23.0.7; version=>= 24.0.0, < 24.0.3

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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