CVE-2009-2816

Name: CVE-2009-2816
Creator: NVD / NIST
Published: 2009-11-13T15:30:00.563+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.55%

Last modified Jun 16, 2026

CVE-2009-2816 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.55% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

1.55%

72.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Apple	Safari	< 4.0.4
Google	Chrome	< 3.0.195.33
Apple	Iphone Os	< 4.0
Opensuse	Opensuse	11.2
Opensuse	Opensuse	11.3
Fedoraproject	Fedora	11
Fedoraproject	Fedora	12

References

http://lists.apple.com/archives/security-announce/2009/Nov/msg00001.htmlMailing List, Patch, Vendor Advisory
http://lists.apple.com/archives/security-announce/2010/Jun/msg00003.htmlMailing List, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.htmlThird Party Advisory
http://osvdb.org/59940Broken Link
http://osvdb.org/59967Broken Link
http://secunia.com/advisories/37346Third Party Advisory
http://secunia.com/advisories/37358Third Party Advisory
http://secunia.com/advisories/37393Third Party Advisory
http://secunia.com/advisories/37397Third Party Advisory
http://secunia.com/advisories/43068Third Party Advisory
http://support.apple.com/kb/HT3949Patch, Vendor Advisory
http://support.apple.com/kb/HT4225Vendor Advisory
http://www.securityfocus.com/bid/36997Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1023165Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2009/3217Vendor Advisory
http://www.vupen.com/english/advisories/2009/3233Vendor Advisory
http://www.vupen.com/english/advisories/2011/0212Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=525789Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/54239Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6516Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00545.htmlThird Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00549.htmlThird Party Advisory
http://lists.apple.com/archives/security-announce/2009/Nov/msg00001.htmlMailing List, Patch, Vendor Advisory
http://lists.apple.com/archives/security-announce/2010/Jun/msg00003.htmlMailing List, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.htmlThird Party Advisory
http://osvdb.org/59940Broken Link
http://osvdb.org/59967Broken Link
http://secunia.com/advisories/37346Third Party Advisory
http://secunia.com/advisories/37358Third Party Advisory
http://secunia.com/advisories/37393Third Party Advisory
http://secunia.com/advisories/37397Third Party Advisory
http://secunia.com/advisories/43068Third Party Advisory
http://support.apple.com/kb/HT3949Patch, Vendor Advisory
http://support.apple.com/kb/HT4225Vendor Advisory
http://www.securityfocus.com/bid/36997Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1023165Third Party Advisory, VDB Entry
http://www.vupen.com/english/advisories/2009/3217Vendor Advisory
http://www.vupen.com/english/advisories/2009/3233Vendor Advisory
http://www.vupen.com/english/advisories/2011/0212Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=525789Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/54239Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6516Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00545.htmlThird Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00549.htmlThird Party Advisory

Timeline

Published: Nov 13, 2009
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2009-2816?

How severe is CVE-2009-2816?

Severity scoring for CVE-2009-2816 is pending analysis. The EPSS model estimates a 1.55% probability of exploitation in the next 30 days.

How do I fix CVE-2009-2816?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-2816?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST