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Hacktivity

Every decision, on the record.

Resolved, duplicate and informative alike. Triage time and time-to-bounty are shown per report, because a platform that hides its misses is not measuring anything.

Disclosed
2
Paid in this view
$665k
Severityallcriticalhighmediumlow
Stateallresolvedtriagednewduplicateinformative
Filtered by program:nimbus-mail ×
  • highPGN-10457

    JMAP blob download ignores mailbox ACL for shared calendars

    Attachments on events in a calendar shared read-only could be fetched by blob id after the share was revoked.

    Nimbus Mail@mirabelMissing Authorization20 Oct 2026triage 6.4hresolved 3.8d
    $11,000
    Resolved
  • lowPGN-10368

    Bridge IMAP IDLE handler accepts unauthenticated NOOP that resets rate limiter

    Accepted at Low with a demonstrated 10x increase in login attempts per minute against a researcher account.

    Nimbus Mail@ptr_nullImproper Restriction of Excessive Authentication Attempts22 Sept 2026triage 4.3hresolved 2.9d
    $600
    Resolved
Hacktivity
Connecting
  • Bounty paidNimbus Mail@mirabel
    JMAP blob download ignores mailbox ACL for shared calendars
    high
    $11k
  • Bounty paidNimbus Mail@ptr_null
    Bridge IMAP IDLE handler accepts unauthenticated NOOP that resets rate limiter
    low
    $600
All disclosed reports →