EIP-2026-103574

PRE-CVE

Mozilla Firefox 50 < 55 - Stack Overflow Denial of Service

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103574. PoCs published by Geeknik Labs.

AI-analyzed exploit summary This is a functional proof-of-concept for a stack overflow DoS vulnerability in Mozilla Firefox versions 50-55. The exploit triggers a crash by creating an excessively large string of HTML anchor tags and embedding it in a data URI, causing a stack overflow in the `nsINode::doRemoveChildAt` function.

Description

Mozilla Firefox 50 < 55 - Stack Overflow Denial of Service

Exploits (1)

exploitdb WORKING POC VERIFIED
by Geeknik Labs · htmldosmultiple
https://www.exploit-db.com/exploits/42027

This is a functional proof-of-concept for a stack overflow DoS vulnerability in Mozilla Firefox versions 50-55. The exploit triggers a crash by creating an excessively large string of HTML anchor tags and embedding it in a data URI, causing a stack overflow in the `nsINode::doRemoveChildAt` function.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Mozilla Firefox v50 - v55
No auth needed
Prerequisites: Victim must visit a webpage containing the exploit code
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026