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PatchSiren cyber security CVE debrief

CVE-2026-118335 Google CVE debrief

CVE-2026-118335 is an improper input validation vulnerability in Google Chrome on Mac prior to version 156.0.8078.73. This vulnerability could potentially allow a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. The CVSS score for this vulnerability is 8.8, indicating a high severity. Defenders responsible for managing Google Chrome installations on Mac systems should assess exposure and prioritize patching. Users who frequently access HTML pages from untrusted sources are at higher risk. The vulnerability was reported by an external researcher and is considered High severity by Chromium. The CVE record and NVD entry provide details on the but

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-27
Original CVE updated
2026-11-02
Advisory published
2026-10-27
Advisory updated
2026-11-02

Who should care

Defenders responsible for managing Google Chrome installations on Mac systems should assess exposure and prioritize patching. Users who frequently access HTML pages from untrusted sources are at higher risk.

Why it matters

CVE-2026-118335 is a high-severity vulnerability in Google Chrome on Mac that could allow remote code execution. Defenders should prioritize patching and monitor for suspicious activity.

  • Potential remote code execution inside the sandbox
  • High severity vulnerability with CVSS score of 8.8
  • Requires patching to prevent potential exploitation

Technical summary

The vulnerability is caused by improper input validation in Google Chrome on Mac. An attacker could potentially execute arbitrary code inside the sandbox via a crafted HTML page. This vulnerability affects Google Chrome on Mac systems prior to version 156.0.8078.73. Defenders should prioritize patching this vulnerability, especially for users who frequently access HTML pages from untrusted sources. The CVSS score of 8.8 indicates high severity.

Defensive priority

Defenders should prioritize patching this vulnerability, especially for users who frequently access HTML pages from untrusted sources.

Recommended defensive actions

  • Patch Google Chrome on Mac to version 156.0.8078.73 or later
  • Monitor for suspicious HTML page activity
  • Restrict access to untrusted sources

Evidence notes

The vulnerability was reported by an external researcher and is considered High severity by Chromium. The CVE record and NVD entry provide details on the vulnerability, but additional information about exploitation or impact is limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-118335 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-118335

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

  • CVE-2026-118335 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-118335

    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.