CVE-2026-6307

HIGH

Google Chrome <147.0.7727.101 - Type Confusion

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2026-6307. PoCs published by amnsecurity, 0xsha, J4ck3LSyN-Gen2.

AI-analyzed exploit summary This repository contains a proof-of-concept exploit for CVE-2026-6307, a type confusion vulnerability in Chrome V8's Turbofan JIT compiler. The exploit demonstrates how incorrect type assumptions in optimized JavaScript code can lead to sandbox escape, with conceptual JavaScript payloads for triggering the vulnerability.

Description

Type Confusion in Turbofan in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

Exploits (3)

github WORKING POC 1 stars
by amnsecurity · pythonpoc
https://github.com/amnsecurity/CVE-2026-6307-Chrome-V8-Sandbox-Escape

This repository contains a proof-of-concept exploit for CVE-2026-6307, a type confusion vulnerability in Chrome V8's Turbofan JIT compiler. The exploit demonstrates how incorrect type assumptions in optimized JavaScript code can lead to sandbox escape, with conceptual JavaScript payloads for triggering the vulnerability.

Classification
Working Poc 95%
Attack Type
Other
Complexity
Complex
Reliability
Theoretical
Target: Google Chrome (V8 Engine) prior to 147.0.7727.101
No auth needed
Prerequisites: Vulnerable Chrome version (< 147.0.7727.101) · User interaction (visiting malicious page) · Disabled security features (if any)
mistral-large-3 · analyzed Jul 13, 2026 Full analysis →
github WORKING POC 1 stars
by 0xsha · htmlpoc
https://github.com/0xsha/CVE-2026-6307

This repository contains a functional exploit for CVE-2026-6307, a V8 JS-to-Wasm type confusion vulnerability in Chrome 146. It includes both flag-free primitives and a full RCE demonstration (e.g., popping xcalc) with detailed technical explanations and verification steps.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: Chrome for Testing 146.0.7680.165
No auth needed
Prerequisites: Native x86_64 Linux · ASLR disabled · Chrome 146 on PATH · X display on :0
mistral-large-3 · analyzed Jul 01, 2026 Full analysis →
github WORKING POC
by J4ck3LSyN-Gen2 · pythonpoc
https://github.com/J4ck3LSyN-Gen2/CVE-2026-6307-Longinus

This repository contains a functional Proof-of-Concept (PoC) for CVE-2026-6307, a type confusion vulnerability in V8's TurboFan compiler. The exploit demonstrates arbitrary read/write primitives (addrof/fakeobj) via JS-to-Wasm call inlining and FrameState merging, enabling remote code execution in Chrome's renderer process.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: Google V8 (Chrome renderer)
No auth needed
Prerequisites: V8 with TurboFan and WebAssembly support · d8 shell with --allow-natives-syntax and --expose-wasm flags
mistral-large-3 · analyzed Jul 01, 2026 Full analysis →

Scores

CVSS v3 8.8
EPSS 0.0037
EPSS Percentile 29.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-843
Status published
Products (2)
google/chrome < 147.0.7727.101
Google/Chrome 147.0.7727.101
Published Apr 15, 2026
Tracked Since Apr 16, 2026