PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-17798 Google CVE debrief

A medium-severity vulnerability in Google Chrome's Cast implementation prior to version 151.0.7922.72 allows remote attackers to leak cross-origin data via a crafted HTML page. This vulnerability, identified as CWE-346, results from an inappropriate implementation in the Cast feature. Defenders should be aware that potential cross-origin data leaks may occur, requiring verification and mitigation. Updating to version 151.0.7922.72 or later is necessary to prevent exploitation. Exposure assessment is crucial for environments using Google Chrome.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-30
Original CVE updated
2026-10-23
Advisory published
2026-07-30
Advisory updated
2026-10-23

Who should care

Defenders responsible for managing Google Chrome deployments should assess exposure and prioritize updating to version 151.0.7922.72 or later.

Why it matters

CVE-2026-17798 is a medium-severity vulnerability in Google Chrome's Cast implementation that allows remote attackers to leak cross-origin data. Defenders should prioritize verifying and applying the Chrome update, assessing exposure in their environments, and monitoring for potential cross-origin data leaks.

  • Potential cross-origin data leaks require verification and mitigation
  • Defenders must update Chrome to version 151.0.7922.72 or later to prevent exploitation
  • Exposure assessment is necessary for environments using Google Chrome

Technical summary

The vulnerability is caused by an inappropriate implementation in the Cast feature of Google Chrome. This allows a remote attacker to leak cross-origin data via a crafted HTML page. The vulnerability has a medium severity and is identified as CWE-346.

Defensive priority

Defenders should prioritize verifying and applying the Chrome update to version 151.0.7922.72 or later, and assess exposure in their environments.

Recommended defensive actions

  • Verify and apply the Chrome update to version 151.0.7922.72 or later
  • Assess exposure in environments using Google Chrome
  • Monitor for potential cross-origin data leaks

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its medium severity and the affected Chrome versions. The vulnerability has been publicly disclosed, and defenders should verify and apply the Chrome update to version 151.0.7922.72 or later. The source-provided CVE metadata and official NIST NVD detail page offer additional information on the vulnerability. Defenders must assess exposure in their environments and monitor for potential cross-origin data leaks.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-17798 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-17798

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

  • CVE-2026-17798 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-17798

    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.