How severe is CVE-2015-6786?

CVE-2015-6786 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-6786 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6786?

CVE-2015-6786 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-6786?

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

When was CVE-2015-6786 published?

CVE-2015-6786 was published on 2015-12-06 and last updated on 2026-06-17.

CVE-2015-6786

CVE-2015-6786 is a medium-severity vulnerability in Google Chrome with a CVSS 2.0 base score of 4.3. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Google Chrome
Published: 2015-12-06
Last modified: 2026-06-17

Description

The CSPSourceList::matches function in WebKit/Source/core/frame/csp/CSPSourceList.cpp in the Content Security Policy (CSP) implementation in Google Chrome before 47.0.2526.73 accepts a blob:, data:, or filesystem: URL as a match for a * pattern, which allows remote attackers to bypass intended scheme restrictions in opportunistic circumstances by leveraging a policy that relies on this pattern.

Frequently asked questions

What is CVE-2015-6786?: The CSPSourceList::matches function in WebKit/Source/core/frame/csp/CSPSourceList.cpp in the Content Security Policy (CSP) implementation in Google Chrome before 47.0.2526.73 accepts a blob:, data:, or filesystem: URL as a match for a * pattern, which allows remote attackers to bypass intended scheme restrictions in opportunistic circumstances by leveraging a policy that relies on this pattern.
How severe is CVE-2015-6786?: CVE-2015-6786 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-6786 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6786?: CVE-2015-6786 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-6786?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6786 published?: CVE-2015-6786 was published on 2015-12-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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