How severe is CVE-2011-2986?

CVE-2011-2986 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-2986 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2986?

CVE-2011-2986 primarily affects Mozilla Firefox. In total, 156 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2986?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-2986 published?

CVE-2011-2986 was published on 2011-08-18 and last updated on 2026-06-16.

CVE-2011-2986

CVE-2011-2986 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.0. 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Mozilla Firefox
Published: 2011-08-18
Last modified: 2026-06-16

Description

Mozilla Firefox 4.x through 5, Thunderbird before 6, SeaMonkey 2.x before 2.3, and possibly other products, when the Direct2D (aka D2D) API is used on Windows, allows remote attackers to bypass the Same Origin Policy, and obtain sensitive image data from a different domain, by inserting this data into a canvas.

Frequently asked questions

What is CVE-2011-2986?: Mozilla Firefox 4.x through 5, Thunderbird before 6, SeaMonkey 2.x before 2.3, and possibly other products, when the Direct2D (aka D2D) API is used on Windows, allows remote attackers to bypass the Same Origin Policy, and obtain sensitive image data from a different domain, by inserting this data into a canvas.
How severe is CVE-2011-2986?: CVE-2011-2986 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-2986 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2986?: CVE-2011-2986 primarily affects Mozilla Firefox. In total, 156 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2986?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2986 published?: CVE-2011-2986 was published on 2011-08-18 and last updated on 2026-06-16.

References

Affected products (156)

cpe:2.3:a:mozilla:firefox:4.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta1:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta10:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta11:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta12:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta2:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta3:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta4:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta5:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta6:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta7:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta8:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0:beta9:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:5.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.7.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.7.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:0.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5:beta2:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5.0.1:*:*:*:*:*:*:*

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