hacKicker

Collection / 02

The reading room.

Eleven published articles on parsers, protocols, and the assumptions in between.

NoScript / Tor Browser findings →Research + writing RSS ↗

  1. 2026-06-06
    Inner-Parser SSRF

    The bug class your URL validator was never going to catch.

    Protocols · Medium ↗ · researchlab ↗
  2. 2026-06-04
    Race Conditions Are Not Race Conditions

    Concurrency is the cheapest way to wedge a state machine apart. The window is never the bug.

    Concurrency · Medium ↗ · researchlab ↗
  3. 2026-06-04
    CVE-2026-48840 — Uninitialised Stack Leak in Exim's PROXY Parser

    A malformed PROXY frame disclosed live stack bytes before SMTP authentication when the sender was trusted by hosts_proxy.

    Protocols · Medium ↗ · researchlab ↗
  4. 2026-05-03
    Stylesheets Are Code: Hunting a Build-Time RCE Primitive Hidden in Plain Sight for Four Years

    What the supply-chain checkboxes don't check: the stylesheet compiler runs code.

    Code execution · researchlab ↗
  5. 2026-03-19
    OIDC and OAuth 2.0 for People Looking for Bugs

    If a product uses OAuth artifacts to answer OIDC questions, you are already in bug territory.

    Protocols · Medium ↗
  6. 2026-03-18
    Cookies and CORS for People Looking for Bugs

    Most teams do not have a cookie model or a CORS model. They have folklore.

    Protocols · Medium ↗
  7. 2026-03-17
    JWTs for People Who Hunt Bugs, Not Blog Posts

    A serialized cryptographic object carrying attacker-controlled metadata: the question is what the verifier permits.

    Protocols · Medium ↗
  8. 2026-03-15
    When a Composite Checkout Keeps Pricing From a State That No Longer Exists

    Breaking a transaction invariant in a bundled checkout flow.

    State logic · Medium ↗ · researchlab ↗
  9. 2026-03-14
    Most Bug Bounty Writeups Are Recycled. Real Bugs Are Hiding in the Specs.

    An account takeover through a Google login flow, found by reading the OIDC spec.

    Identity · Medium ↗ · researchlab ↗
  10. 2025-11-19
    The Header No One Was Watching

    A quiet IDOR in a financial system, found because something felt too clean.

    Access control · Medium ↗
  11. 2025-04-14
    Google Gemini iOS: Public Link Sharing Silently Leaks Entire Conversations

    Share a snippet, leak the conversation. Now CVE-2025-5009.

    Product security · Medium ↗

Newest first. Mirrored pieces appear once. Read researchlab ↗