CVE-2014-7939

Google Chrome before 40.0.2214.91, when the Harmony proxy in Google V8 is enabled, allows remote attackers to bypass the Same Origin Policy via crafted JavaScript code with Proxy.create and console.log calls, related to HTTP responses that lack an "X-Content-Type-Options: nosniff" header.

Published: 2015-01-22 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-7939 is rated Moderate Risk (42/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.69%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2014-7939

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-07-16 0.76% 0.69% -0.07%
2 2025-03-30 4.10% 0.76% -3.34%
3 2025-03-29 — 4.10% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-7939

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2014-7939

OS Trackers for CVE-2014-7939

vendor priority summary link
gentoo normal CVE-2014-7939: 1 GLSA(s) (201502-13), 1 atom(s) (www-client/chromium); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-7939
redhat high — https://access.redhat.com/security/cve/CVE-2014-7939
ubuntu medium CVE-2014-7939 medium priority: Ubuntu including 2 source packages (chromium-browser, oxide-qt), 14 status rows across 7 suites (lucid, precise, trusty, upstream, utopic, vivid, wily): released 5, not-affected 4, DNE 3, ignored 2. https://ubuntu.com/security/CVE-2014-7939

Affected software / configurations for CVE-2014-7939

Vendor Product Version Raw CPE
google chrome <= 40.0.2214.85 cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
chromium chromium 40.0.2214.110 cpe:2.3:a:chromium:chromium:40.0.2214.110:*:*:*:*:*:*:*
redhat enterprise_linux_desktop_supplementary 6.0 cpe:2.3:o:redhat:enterprise_linux_desktop_supplementary:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_supplementary 6.0 cpe:2.3:o:redhat:enterprise_linux_server_supplementary:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_supplementary_eus 6.6.z cpe:2.3:o:redhat:enterprise_linux_server_supplementary_eus:6.6.z:*:*:*:*:*:*:*
redhat enterprise_linux_workstation_supplementary 6.0 cpe:2.3:o:redhat:enterprise_linux_workstation_supplementary:6.0:*:*:*:*:*:*:*
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
opensuse opensuse 13.2 cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

References for CVE-2014-7939

cvelogic Threat Intelligence