CVE-2026-77166

2.4 LOW 0.3% exploit odds No fix listed Other

What it is

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.

At a glance

Exploitability: Can be exploited over the network with an admin-level account, but needs a user to act. Limited direct impact.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-09-21 16:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-22 20:00 UTC Last updatedMost recent change to the record

Details

Published: 2026-09-21 16:17 UTC
Last modified: 2026-09-22 20:00 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-840
Record status: Deferred

Attack profile CVSS 3.0 · 2.4

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: Low
Availability: None

Raw vector

CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

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References

NVD record · CVE.org record