CVE-2024-8381

CRITICAL

Firefox < 130 and Firefox ESR < 115.15 - Type Confusion via 'with' Environment Property Lookup

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2024-8381. PoCs published by bjrjk.

AI-analyzed exploit summary This repository contains a proof-of-concept exploit for CVE-2024-8381, a SpiderMonkey interpreter type confusion vulnerability. The exploit demonstrates memory corruption leading to arbitrary code execution via a crafted JavaScript object and type confusion.

Description

A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the `with` environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

Exploits (1)

nomisec WORKING POC 15 stars
by bjrjk · poc
https://github.com/bjrjk/CVE-2024-8381

This repository contains a proof-of-concept exploit for CVE-2024-8381, a SpiderMonkey interpreter type confusion vulnerability. The exploit demonstrates memory corruption leading to arbitrary code execution via a crafted JavaScript object and type confusion.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: Mozilla SpiderMonkey (Firefox JavaScript engine)
No auth needed
Prerequisites: ASLR disabled · Specific SpiderMonkey build (commit 198d5fc1bebaaf114197a529ebdd4b9601045719)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 9.8
EPSS 0.0440
EPSS Percentile 90.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-843
Status published
Products (2)
mozilla/firefox < 130.0
mozilla/firefox_esr < 115.15
Published Sep 03, 2024
Tracked Since Feb 18, 2026