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PatchSiren cyber security CVE debrief

CVE-2026-5873 Google CVE debrief

CVE-2026-5873 is an out-of-bounds read and write vulnerability in V8 in Google Chrome prior to 147.0.7727.55. This vulnerability allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. The Chromium security severity is rated as High with a CVSS score of 8.8. The vulnerability affects users of Google Chrome versions prior to 147.0.7727.55. System administrators and users who rely on Google Chrome for browsing should apply the necessary updates to mitigate this vulnerability.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-24
Advisory published
2026-04-08
Advisory updated
2026-07-24

Who should care

This vulnerability affects users of Google Chrome versions prior to 147.0.7727.55. System administrators and users who rely on Google Chrome for browsing should apply the necessary updates to mitigate this vulnerability. Additionally, security teams and vulnerability management teams should review the vulnerability and assess the impact on their organization.

Technical summary

The vulnerability is caused by an out-of-bounds read and write in the V8 engine used by Google Chrome. This could allow a remote attacker to execute arbitrary code within the sandbox environment of the browser by providing a specially crafted HTML page. The vulnerability has a high impact on the confidentiality, integrity, and availability of the system. It affects users of Google Chrome versions prior to 147.0.7727.55. System administrators and users who rely on Google Chrome for browsing should apply the necessary updates to mitigate this vulnerability. The Chromium security severity is rated as High with a CVSS score of 8.8.

Defensive priority

High

Recommended defensive actions

  • Apply the latest update for Google Chrome to version 147.0.7727.55 or later.
  • Ensure that all users of Google Chrome within the organization are updated to the latest version.
  • Monitor Google Chrome for any further updates or advisories related to this vulnerability.
  • Consider implementing additional security measures such as sandboxing and monitoring for suspicious browser activity.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-04-08T22:16:26.907Z and was last modified on 2026-07-24T08:10:00.150Z. The NVD entry is currently Analyzed. This information is based on the provided source corpus and may not reflect the full scope of the vulnerability. Further verification is recommended to ensure accurate understanding of the vulnerability's impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5873 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5873

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-5873 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5873

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.