Is CVE-2009-2816 being actively exploited?

CVE-2009-2816 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-2816?

CVE-2009-2816 has a CVSS 2.0 base score of 6.8 (MEDIUM).

CVE-2009-2816

MEDIUM · CVSS 6.8EPSS 1.6%EU EUVD

The implementation of Cross-Origin Resource Sharing (CORS) in WebKit, as used in Apple Safari before 4.0.4 and Google Chrome before 3.0.195.33, includes certain custom HTTP headers in the OPTIONS request during cross-origin operations with preflight, which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks via a crafted web page.

Key facts

CVSS score: 6.8 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-352
EPSS score: 1.6% (75th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-2806)
Published: November 13, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-2806 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

apple / iphone os
apple / safari
fedoraproject / fedora
fedoraproject / fedora
google / chrome
opensuse / opensuse
opensuse / opensuse

References

http://lists.apple.com/archives/security-announce/2009/Nov/msg00001.html(Mailing List, Patch, Vendor Advisory)
http://lists.apple.com/archives/security-announce/2010/Jun/msg00003.html(Mailing List, Vendor Advisory)
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html(Third Party Advisory)
http://osvdb.org/59940(Broken Link)
http://osvdb.org/59967(Broken Link)
http://secunia.com/advisories/37346(Third Party Advisory)
http://secunia.com/advisories/37358(Third Party Advisory)
http://secunia.com/advisories/37393(Third Party Advisory)
http://secunia.com/advisories/37397(Third Party Advisory)
http://secunia.com/advisories/43068(Third Party Advisory)
http://support.apple.com/kb/HT3949(Patch, Vendor Advisory)
http://support.apple.com/kb/HT4225(Vendor Advisory)
http://www.securityfocus.com/bid/36997(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1023165(Third Party Advisory, VDB Entry)
http://www.vupen.com/english/advisories/2009/3217(Vendor Advisory)
http://www.vupen.com/english/advisories/2009/3233(Vendor Advisory)
http://www.vupen.com/english/advisories/2011/0212(Vendor Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=525789(Issue Tracking, Third Party Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/54239(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6516(Third Party Advisory)
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00545.html(Third Party Advisory)
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00549.html(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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