Is CVE-2006-3803 in the CISA KEV catalog?

No. CVE-2006-3803 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-3803?

CVE-2006-3803 has a CVSS v2 base score of 5.1 (MEDIUM).

What is the EPSS score for CVE-2006-3803?

CVE-2006-3803 has an EPSS score of 4.38% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2006-3803?

Upgrade firefox on debian unstable to 1.5.dfsg+1.5.0.5-1 or later.

CVE & CISA-KEV Catalog

CVE-2006-3803

MEDIUMEPSS 90th pctl

5.1

CVSS v2

NVD

Description

Race condition in the JavaScript garbage collection in Mozilla Firefox 1.5 before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3 might allow remote attackers to execute arbitrary code by causing the garbage collector to delete a temporary variable while it is still being used during the creation of a new Function object.

How to fix

Remediation Available

firefoxDebian

Fixed in:1.5.dfsg+1.5.0.5-1CVE-2006-3803

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

4.38%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Embed a live status badge for CVE-2006-3803

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.