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PatchSiren cyber security CVE debrief

CVE-2016-5206 Google CVE debrief

CVE-2016-5206 is a Chrome PDF plugin issue where redirect handling was incorrect, creating a path to bypass Same Origin Policy from a crafted HTML page. The supplied record classifies it as high severity (CVSS 8.8) and maps it to a browser integrity problem rather than a code-execution flaw.

Vendor
Google
Product
CVE-2016-5206
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2017-01-19
Original CVE updated
2026-05-13
Advisory published
2017-01-19
Advisory updated
2026-05-13

Who should care

Organizations that use Google Chrome on desktop or Android, especially environments that rely on browser isolation, web app boundaries, or strict origin-based access controls. Security and endpoint teams should prioritize this for any fleet that may still have unpatched Chrome versions.

Technical summary

According to the supplied CVE description, the PDF plugin in Google Chrome followed redirects incorrectly. That behavior allowed a remote attacker to use a crafted HTML page to bypass Same Origin Policy, which is the browser mechanism that helps keep data from one origin separated from another. NVD classifies the weakness as CWE-284 and gives a network, low-complexity, user-interaction-required, high-impact profile (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). The supplied record also includes Chrome versioning references for the fix window, with the description naming desktop and Android fixed releases and the NVD CPE criteria marking affected Chrome versions up to an older listed build.

Defensive priority

High: browser-origin bypasses can undermine web security controls, so patch Chrome promptly and verify vulnerable versions are removed from the fleet.

Recommended defensive actions

  • Update Google Chrome to a fixed release on desktop and Android as soon as possible.
  • Inventory Chrome versions across managed devices and confirm no affected builds remain installed.
  • Treat browser-origin bypass issues as policy-impacting findings for web isolation, SSO, and internal application access controls.
  • Review downstream advisories and vendor release notes referenced in the CVE record for platform-specific remediation guidance.
  • If temporary mitigation is needed, restrict exposure from untrusted HTML/content sources until patching is complete.

Evidence notes

The supplied CVE description states that the Chrome PDF plugin incorrectly followed redirects and enabled Same Origin Policy bypass via a crafted HTML page. The official NVD record assigns CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H and CWE-284, and the record includes vendor-linked references to a Chrome release notice, a Chromium bug, and downstream advisories. The supplied data also shows a version-range detail in NVD CPE criteria (up to 54.0.2840.99) alongside the description’s fixed-version wording (55.0.2883.75 desktop / 55.0.2883.84 Android); both are retained here as part of the record without adding unsupported interpretation.

Official resources

First public record in the supplied corpus is 2017-01-19T05:59:00.447Z. A later metadata modification on 2026-05-13T00:24:29.033Z does not change the original disclosure date.