rootpwn

medium · CVSS v3 4.3 · CVSS v4 5.3

CVE-2026-100674

stoatchat before 0.15.5 fails to revalidate usernames after Unicode sanitization, allowing attackers to create usernames…

Description

stoatchat before 0.15.5 fails to revalidate usernames after Unicode sanitization, allowing attackers to create usernames with forbidden characters by submitting Unicode letters that transform into rejected characters. Attackers can bypass character allowlists and length limits to create reserved-name lookalikes, embed special characters, and exceed the 32-character storage limit.

Scores

Severity
medium
CVSS v2
4
CVSS v3
4.3
CVSS v4
5.3
EPSS
—

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