What is CVE-2022-31118?

CVE-2022-31118 is a medium-severity vulnerability in Nextcloud Server, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2022-08-04.

How severe is CVE-2022-31118?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Nextcloud Server

CVE-2022-31118

Nextcloud server is an open source personal cloud solution. In affected versions an attacker could brute force to find if federated sharing is being used and potentially try to brute force access tokens for federated shares (`a-zA-Z0-9` ^ 15). It is recommended that the Nextcloud Server is upgraded to 22.2.9, 23.0.6 or 24.0.2. Users unable to upgrade may disable federated sharing via the Admin Sharing settings in `index.php/settings/admin/sharing`.

Published 2022-08-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.007 (53.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Nextcloud Server
Nextcloud Security-Advisories — versions < 22.2.9, >= 23.0.0, < 23.0.6, >= 24.0.0, < 24.0.2

Weakness classification (CWE)

References

github.com/nextcloud/security-advisories/security/advisories/GHSA-2vwh-5v93-3vcq (Third Party Advisory)
github.com/nextcloud/server/pull/32843/commits/6eb692da7fe73c899cb6a8d2aa045edd… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-31118?: CVE-2022-31118 is a medium-severity vulnerability in Nextcloud Server, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2022-08-04.
How severe is CVE-2022-31118?: Medium severity. CVSS v3 base score is 6.5 out of 10.