CVE-2026-77166

low

Assigned by CNA: hackerone

Published 2026-09-21 · Modified 2026-09-21

Discuss on Community Propose mitigation

CVSS v3

2.4

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

CVSS v4 NEW

—

not yet in upstream

VIR risk

2.4

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.

Predictions

Exploit likelihood

36%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

References

https://hackerone.com/reports/3599470

CWEs

CWE-840

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.