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    CVE-2009-2816

    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.

    Published:Nov 11, 2009
    Last Modified:Apr 23, 2026
    EPS:Nov 13, 2009
    EPSS Score:0.02154
    CVSS Score:6.8

    Affected Products

    Vendor
    Apple
    Product
    Iphone Os
    Vendor
    Apple
    Product
    Safari
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Google
    Product
    Chrome
    Vendor
    Opensuse
    Product
    Opensuse

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-87545 (CVSS 6.5) — Information leak in Mobile in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote attacker leverag…
    CVE-2026-87609 (CVSS 9.6) — Use after free in Sharing in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote attacker to execu…
    CVE-2026-87518 (CVSS 5.3) — Observable discrepancy in Safebrowsing in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote atta…
    CVE-2026-87482 (CVSS 5.9) — Cleartext transmission of sensitive data in HttpsUpgrades in Google Chrome on on iOS prior to 153.0.8010.36 al…
    CVE-2026-87517 (CVSS 3.1) — Race condition in Mobile in Google Chrome on on iOS prior to 153.0.8010.36 allowed a remote attacker leveragin…
    CVE-2026-85047 (CVSS 9.6) — Improper input validation in Transactions Platform in Google Chrome on on iOS prior to 152.0.7977.82 allowed a…
    CVE-2026-78964 (CVSS 9.6) — Use after free in Sync in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to potentia…
    CVE-2026-78957 (CVSS 5.5) — Information leak in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a local attacker to obtai…
    CVE-2026-78981 (CVSS 6.5) — Information leak in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a local attacker to poten…
    CVE-2026-79105 (CVSS 4.3) — Improper input validation in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacke…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High