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.
Metrics
Affected Vendors & Products
References
History
Wed, 30 Sep 2026 15:30:00 +0000
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| Metrics |
ssvc
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Sat, 26 Sep 2026 17:15:00 +0000
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| First Time appeared |
Stoatchat
Stoatchat stoatchat |
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| Vendors & Products |
Stoatchat
Stoatchat stoatchat |
Sat, 26 Sep 2026 13:30:00 +0000
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| 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. | |
| Title | stoatchat before 0.15.5 Username Validation Bypass via Unicode Sanitization | |
| Weaknesses | CWE-180 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-26T13:23:37.620Z
Updated: 2026-09-30T14:58:59.656Z
Reserved: 2026-09-26T02:34:55.635Z
Link: CVE-2026-100674
Updated: 2026-09-30T14:58:54.578Z
Status : Deferred
Published: 2026-09-26T14:16:51.297
Modified: 2026-09-30T15:22:16.023
Link: CVE-2026-100674
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