How severe is CVE-2006-3806?

CVE-2006-3806 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2006-3806 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3806?

CVE-2006-3806 primarily affects Mozilla Firefox. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3806?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2006-3806 published?

CVE-2006-3806 was published on 2006-07-27 and last updated on 2026-06-16.

CVE-2006-3806

CVE-2006-3806 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Mozilla Firefox
Published: 2006-07-27
Last modified: 2026-06-16

Description

Multiple integer overflows in the Javascript engine in Mozilla Firefox 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 via vectors involving (1) long strings in the toSource method of the Object, Array, and String objects; and (2) unspecified "string function arguments."

Frequently asked questions

What is CVE-2006-3806?: Multiple integer overflows in the Javascript engine in Mozilla Firefox 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 via vectors involving (1) long strings in the toSource method of the Object, Array, and String objects; and (2) unspecified "string function arguments."
How severe is CVE-2006-3806?: CVE-2006-3806 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-3806 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3806?: CVE-2006-3806 primarily affects Mozilla Firefox. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3806?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-3806 published?: CVE-2006-3806 was published on 2006-07-27 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:mozilla:firefox:1.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.5.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0:*:dev:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5.0.4:*:*:*:*:*:*:*

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