EIP-2026-103558

PRE-CVE

Mozilla Firefox 1.0.7 (Mozilla 1.7.12) - Denial of Service

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103558. PoCs published by Kubbo.

AI-analyzed exploit summary This exploit leverages a CSS injection vulnerability in older versions of Firefox and Mozilla Browser by using a malformed `link` tag with an empty `href` attribute. The vulnerability could lead to arbitrary code execution or denial of service due to improper handling of the stylesheet reference.

Description

Mozilla Firefox 1.0.7 (Mozilla 1.7.12) - Denial of Service

Exploits (1)

exploitdb WORKING POC VERIFIED
by Kubbo · htmldosmultiple
https://www.exploit-db.com/exploits/1257

This exploit leverages a CSS injection vulnerability in older versions of Firefox and Mozilla Browser by using a malformed `link` tag with an empty `href` attribute. The vulnerability could lead to arbitrary code execution or denial of service due to improper handling of the stylesheet reference.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Firefox <= 1.0.7, Mozilla Browser <= 1.7.12
No auth needed
Prerequisites: Victim must visit a malicious webpage
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026