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Vulnerabilities

Vulnerability · CVE-2026-118331

Improper input validation in FileAPI in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a c…

Published Oct 27, 2026 · catalog updated Oct 27, 2026 · Google Chrome

Last checked Oct 28, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-118331. EPSS is 0.24%. Act only if a listed version of Google Chrome is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Advisory link
Affected products
vendor Google Chrome

Improper input validation in FileAPI in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Google Chromeversion unspecified

How to fix CVE-2026-118331

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-118331. EPSS is 0.24%. Act only if a listed version of Google Chrome is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 0.24%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 27, 2026 · Chrome Releases

    Detected

    CVE-2026-118331 is listed by Stable Channel Update for Desktop.

  2. Oct 27, 2026 · CVE.org

    Updated

    Improper input validation in FileAPI in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

Sources

  • Chrome ReleasesVendor advisoryCVE-2026-118331

    The Stable channel has been updated to 156.0.8078.73/.74 for Windows and Mac and 156.0.8078.73 to Linux which will roll out

    blogger.com
  • CVE.orgVulnerability recordCVE-2026-118331

    Improper input validation in FileAPI in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-118331

    30-day exploitation probability 0.24%

    first.org

References

Freshness

Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Chrome ReleasesOct 28, 2026
  • FIRST EPSSOct 28, 2026
  • CVE.orgOct 28, 2026
CVE-2026-118331: Improper input validation in FileAPI in Google Chr… · ZeroDay Findings