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CVE-2026-18003 Google CVE debrief

CVE-2026-18003 is a UI spoofing vulnerability in Google Chrome for iOS prior to version 151.0.7922.72. An attacker can exploit this vulnerability via a crafted HTML page, potentially leading to user interface deception. The CVSS score is 4.3, and the severity is MEDIUM. Defenders should verify Chrome for iOS versions and update to the fixed version to mitigate this vulnerability. This vulnerability requires verification of Chrome for iOS versions and updating to 151.0.7922.72 or later.

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 for iOS deployments should assess exposure and prioritize updating to the fixed version. This includes IT administrators, security teams, and anyone responsible for maintaining Chrome for iOS installations. They should verify Chrome for iOS versions to prevent UI spoofing and update to 151.0.7922.72 or later to patch the vulnerability. Additionally, they should monitor

Why it matters

CVE-2026-18003 is a UI spoofing vulnerability in Google Chrome for iOS that requires verification of Chrome for iOS versions and updating to 151.0.7922.72 or later.

  • Verify Chrome for iOS versions to prevent UI spoofing
  • Update to 151.0.7922.72 or later to patch the vulnerability
  • Monitor Chrome releases for future updates to ensure continued security

Technical summary

The vulnerability is caused by inappropriate implementation in Chrome for iOS, allowing a remote attacker to perform UI spoofing via a crafted HTML page. This issue affects Google Chrome for iOS versions prior to 151.0.7922.72. The vulnerability has a CVSS score of 4.3 and is classified as MEDIUM severity. Defenders should prioritize verifying Chrome for iOS versions and updating to 151.0.7922.72 or later.

Defensive priority

Defenders should prioritize verifying Chrome for iOS versions and updating to 151.0.7922.72 or later.

Recommended defensive actions

  • Verify Chrome for iOS versions and update to 151.0.7922.72 or later
  • Monitor Chrome releases for future updates
  • Review and implement secure coding practices for HTML page handling

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability. However, the corpus does not establish versions, exploitation, impact, or remediation beyond updating Chrome for iOS.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18003 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18003

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

  • CVE-2026-18003 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18003

    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.