Trenchant (L3Harris)

Chrome Sandbox Escape Android - Vulnerability Researcher

Trenchant (L3Harris)

GlobalFullTimePosted Jul 31, 2026

Job description

We are looking for a senior researcher with deep practical experience identifying and exploiting vulnerabilities across Chrome sandbox boundaries on Android. You should already know how to move from a compromised renderer or low-privilege browser process to a meaningful trust-boundary violation. The goal is stable, chainable sandbox-escape capability on real Android targets.

What you’ll work on

  • Renderer-accessible Mojo interfaces, interface brokers and browser-process endpoints.
  • GPU, media, network, utility, device and other services reachable from low-privilege Chrome processes.
  • Android-specific Chrome integration, including platform bridges, Binder-facing components, permissions and service boundaries.
  • Confused-deputy conditions, validation gaps, unsafe deserialisation, lifetime errors, races and state-machine mistakes.
  • Cross-process exploitation where asynchronous IPC, handles, shared memory or capability transfer affect reliability.
  • End-to-end chains with renderer and Android-kernel researchers when needed. What you’ll deliver
  • Original vulnerabilities that cross a Chrome process, privilege or trust boundary on Android.
  • Reliable sandbox-escape exploit components that work under production mitigations.
  • Prioritised attack-surface areas that are deemed to be complex enough to contain vulnerabilities.
  • Triggers, PoCs, exploitability analysis, target assumptions and complete technical handover.
  • Reusable tooling for IPC discovery, Mojo message generation, tracing, instrumentation, coverage and variant analysis. What we’re looking for
  • Demonstrable delivery of Chrome/Chromium sandbox escapes, browser-process vulnerabilities or closely comparable cross-privilege exploitation.
  • Deep knowledge of Chromium’s multi-process architecture, sandbox policy and renderer-to-browser trust boundaries.
  • Strong practical experience with Mojo IPC, bindings, data pipes, shared memory, interface ownership and message validation.
  • Advanced C++ vulnerability-research and exploitation skills in complex multi-process targets.
  • Working knowledge of Android internals relevant to Chrome, including application isolation, SELinux domains, Binder and platform services.
  • The ability to turn a subtle boundary mistake into a stable result that can be integrated into a wider chain.
  • Independent research ownership and a consistent history of finishing high-difficulty work. Strong signals
  • Credited Chrome sandbox escapes or comparable real-world cross-privilege exploit delivery.
  • Custom Mojo fuzzers, IPC introspection tools or Chrome instrumentation frameworks.
  • Experience chaining renderer compromise through sandbox escape to Android system or kernel impact.
  • Research across multiple Android OEMs, chipsets and Chrome branches. - vulnerabilities found made it to stable/beta releases.
  • Strong patch-analysis and variant-hunting results. How we work
  • Fully remote, with high autonomy and close collaboration between browser, platform and kernel specialists.
  • We measure progress through technically meaningful, reproducible delivery.
  • Public CVEs are not a requirement.