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Same Origin Policy bypass in Google Chrome DeviceBoundSessionCredentials

IdentifiersCVE-2026-13021CWE-284

CVE-2026-13021 is a high-severity inappropriate implementation vulnerability in DeviceBoundSessionCredentials in Google Chrome prior to 149.0.7827.197. According to the provided advisory, the flaw can be triggered by a remote attacker using a crafted HTML page and results in a bypass of the browser same origin policy. The available source material does not provide the specific vulnerable function or lower-level implementation details beyond identifying the affected component as DeviceBoundSessionCredentials.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows a remote attacker to bypass Chrome’s same origin policy. This can enable unauthorized cross-origin access or interactions that should normally be isolated by the browser security model, potentially exposing sensitive data from other origins or permitting restricted actions in a victim’s browser context.

Mitigation

If you can’t patch tonight, do this now.

Apply the vendor update as soon as possible. Until patching is completed, reduce exposure by limiting use of untrusted or attacker-controlled web content, hardening browser update compliance across enterprise fleets, and restricting access to sensitive web applications from unpatched Chrome instances. No vendor-specified workaround was provided in the supplied content.

Remediation

Patch, then assume compromise.

Upgrade Google Chrome to version 149.0.7827.197 or later. The fixed Stable channel versions referenced in the provided content are 149.0.7827.196/197 for Windows and Mac and 149.0.7827.196 for Linux; the advisory specifically recommends 149.0.7827.197 or later.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
GoogleChromeapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

4 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-13021
NVD
nvd.nist.gov/vuln/detail/CVE-2026-13021
MITRE CWE · CWE-284
cwe.mitre.org