CVE-2011-0057

CVE-2011-0057 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. 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-399.

Key facts

Description

Use-after-free vulnerability in the Web Workers implementation in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, and SeaMonkey before 2.0.12, allows remote attackers to execute arbitrary code via vectors related to a JavaScript Worker and garbage collection.

Frequently asked questions

What is CVE-2011-0057?
Use-after-free vulnerability in the Web Workers implementation in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, and SeaMonkey before 2.0.12, allows remote attackers to execute arbitrary code via vectors related to a JavaScript Worker and garbage collection.
How severe is CVE-2011-0057?
CVE-2011-0057 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-0057 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0057?
CVE-2011-0057 primarily affects Mozilla Firefox. In total, 157 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0057?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-0057 published?
CVE-2011-0057 was published on 2011-03-02 and last updated on 2026-06-16.

References

Affected products (157)

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