CVE-2026-100674 — stoatchat before 0.15.5 Username Validation Bypass via Unicode Sanitization
stoatchat before 0.15.5 fails to revalidate usernames after Unicode sanitization, allowing attackers to create usernames with forbidden characters by submitting Unicode letters …
Published: 2026-09-26 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7