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    CVE-2026-100674

    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.

    Published:Sep 26, 2026
    Last Modified:Sep 30, 2026
    EPS:Sep 26, 2026
    EPSS Score:0.00234
    CVSS Score:4.3

    Affected Products

    Vendor
    Stoatchat
    Product
    Stoatchat

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-73058 (CVSS 6.9) — stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowi…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High