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    CVE-2026-100678

    stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP addresses to bypass rate limiting and gain account access.

    Published:Sep 26, 2026
    Last Modified:Sep 30, 2026
    EPS:Sep 26, 2026
    EPSS Score:0.00242
    CVSS Score:6.5

    Affected Products

    Vendor
    Stoatchat
    Product
    Stoatchat

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-100676 (CVSS 8.8) — January, the media proxy/embed service of stoatchat (stoatchat/stoatchat), before version 0.15.5 improperly re…
    CVE-2026-100675 (CVSS 7.1) — stoatchat versions before 0.15.5 contain a denial of service vulnerability in the acknowledgement worker that …
    CVE-2026-100674 (CVSS 5.3) — stoatchat before 0.15.5 fails to revalidate usernames after Unicode sanitization, allowing attackers to create…
    CVE-2026-74869 (CVSS 8.3) — stoatchat before 0.15.0 contains a missing authorization vulnerability in the Subscribe message handler that a…
    CVE-2026-73059 (CVSS 7.1) — stoatchat before 0.15.0 contains a permission bypass vulnerability in the message_fetch route that checks only…
    CVE-2026-73058 (CVSS 6.9) — stoatchat versions before 0.15.0 fail to block the IPv6 unspecified address (::) in the SSRF blocklist, allowi…
    CVE-2026-73057 (CVSS 8.7) — stoatchat before 0.15.0 fails to validate SVG viewBox dimensions in the proxy endpoint, allowing attackers to …
    CVE-2026-63088 (CVSS 7.7) — stoatchat before 0.14.0 contains a server-side request forgery (SSRF) vulnerability that allows unauthenticate…

    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