# Netscape Navigator vulnerabilities

Source: https://junglewise.ai/threats/technologies/navigator  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/navigator.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Netscape Navigator: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-1999-0537, was published on 1 April 1998.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 5 (0 critical, 0 exploited in the wild)

## About Netscape Navigator

Early web browser developed by Netscape Communications Corporation for graphical internet browsing.

## Latest Netscape Navigator vulnerabilities

- [CVE-1999-0537: Microsoft Internet Explorer and Netscape Navigator insecure active content execution](https://junglewise.ai/threats/cve-1999-0537-microsoft-internet-explorer-and-netscape-navigator-insecure-active) (high, CVSS 7.5, published 1 Apr 1998)
- [CVE-1999-1262: Netscape Navigator Java security model bypass](https://junglewise.ai/threats/cve-1999-1262-netscape-navigator-java-security-model-bypass) (medium, CVSS 5.1, published 1 Aug 1997)
- [CVE-1999-0031: Microsoft Internet Explorer and Netscape Navigator information disclosure via JavaScript](https://junglewise.ai/threats/cve-1999-0031-microsoft-internet-explorer-and-netscape-navigator-information) (low, CVSS 2.6, published 8 Jul 1997)
- [CVE-1999-0141: Sun Microsystems Java arbitrary command execution in Bytecode Verifier](https://junglewise.ai/threats/cve-1999-0141-sun-microsystems-java-arbitrary-command-execution-in-bytecode) (low, CVSS 3.7, published 29 Mar 1996)
- [CVE-1999-0142: Netscape Navigator and JDK Security Manager restriction bypass](https://junglewise.ai/threats/cve-1999-0142-netscape-navigator-and-jdk-security-manager-restriction-bypass) (high, CVSS 7.5, published 1 Mar 1996)

## Most severe Netscape Navigator vulnerabilities

- [CVE-1999-0537: Microsoft Internet Explorer and Netscape Navigator insecure active content execution](https://junglewise.ai/threats/cve-1999-0537-microsoft-internet-explorer-and-netscape-navigator-insecure-active) (high, CVSS 7.5, published 1 Apr 1998)
- [CVE-1999-0142: Netscape Navigator and JDK Security Manager restriction bypass](https://junglewise.ai/threats/cve-1999-0142-netscape-navigator-and-jdk-security-manager-restriction-bypass) (high, CVSS 7.5, published 1 Mar 1996)
- [CVE-1999-1262: Netscape Navigator Java security model bypass](https://junglewise.ai/threats/cve-1999-1262-netscape-navigator-java-security-model-bypass) (medium, CVSS 5.1, published 1 Aug 1997)
- [CVE-1999-0141: Sun Microsystems Java arbitrary command execution in Bytecode Verifier](https://junglewise.ai/threats/cve-1999-0141-sun-microsystems-java-arbitrary-command-execution-in-bytecode) (low, CVSS 3.7, published 29 Mar 1996)
- [CVE-1999-0031: Microsoft Internet Explorer and Netscape Navigator information disclosure via JavaScript](https://junglewise.ai/threats/cve-1999-0031-microsoft-internet-explorer-and-netscape-navigator-information) (low, CVSS 2.6, published 8 Jul 1997)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Netscape Navigator vulnerabilities", https://junglewise.ai/threats/technologies/navigator, 9 November 2026.