Description
The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
Published: 2026-09-21
Score: 2.4 Low
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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References
Link Providers
https://hackerone.com/reports/3599470 cve-icon cve-icon
History

Mon, 21 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Title Inadequate Input Validation in Emoji Update Endpoint Causes Layout Breakage

Mon, 21 Sep 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Nextcloud
Nextcloud collectives
Vendors & Products Nextcloud
Nextcloud collectives

Mon, 21 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
Weaknesses CWE-840
References
Metrics cvssV3_0

{'score': 2.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N'}

Subscriptions

Nextcloud Collectives
cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-09-21T15:25:33.269Z

Reserved: 2026-08-20T15:00:00.606Z

Link: CVE-2026-77166

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-21T16:17:24.013

Modified: 2026-09-21T16:17:24.013

Link: CVE-2026-77166

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T17:00:09Z

Weaknesses