CVE-2008-4166

Avant Browser < 11.7 - Denial of Service via JavaScript URL Encoding

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2008-4166. PoCs published by 0x90.

AI-analyzed exploit summary This exploit targets an integer overflow vulnerability in Avant Browser's JavaScript engine. It constructs a large string to trigger the overflow, potentially leading to a crash or arbitrary code execution.

Description

Integer overflow in the JavaScript engine in Avant Browser 11.7 Build 9 and earlier allows remote attackers to cause a denial of service (application crash) by attempting to URL encode a string containing many instances of an invalid character.

Exploits (1)

exploitdb WORKING POC VERIFIED
by 0x90 · javascriptdosmultiple
https://www.exploit-db.com/exploits/32381

This exploit targets an integer overflow vulnerability in Avant Browser's JavaScript engine. It constructs a large string to trigger the overflow, potentially leading to a crash or arbitrary code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Theoretical
Target: Avant Browser 11.7 Build 9
No auth needed
Prerequisites: Victim must visit a malicious website
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/4284
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/45121
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/31155
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/496301/100/0/threaded

Scores

EPSS 0.0218
EPSS Percentile 80.0%

Details

CWE
CWE-189
Status published
Products (1)
avantbrowser/avant_browser < 11.7
Published Sep 22, 2008
Tracked Since Feb 18, 2026